{"title":"Montana Agate","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e","products":[{"product_id":"montana-agate-rock-slab-496","title":"Montana Agate Rock Slab 496","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana, US\u003c\/p\u003e\n\u003cp\u003eDimensions:  4.25\" x 2\" and approximately 6 mm thick.  Weight = 63 g.  \u003c\/p\u003e\n\u003cp\u003eShown wet.  Not polished.  \u003cspan data-mce-fragment=\"1\"\u003eKnown flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":40036605591665,"sku":"A110998","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/products\/PA110998a.jpg?v=1666368468"},{"product_id":"copy-of-montana-agate-rock-slab-499","title":"Montana Agate Rock Slab 499","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana, US\u003c\/p\u003e\n\u003cp\u003eDimensions:  2\" x 2\" and approximately 4.8 mm thick.  Weight = 33 g.  \u003c\/p\u003e\n\u003cp\u003eShown wet.  Not polished.  \u003cspan data-mce-fragment=\"1\"\u003eKnown flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":40036610244721,"sku":"A111122","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/products\/PA111122a.jpg?v=1666368936"},{"product_id":"montana-agate-rock-slab-455","title":"Montana Agate Rock Slab 455","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePREFORM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana, US\u003c\/p\u003e\n\u003cp\u003eDimensions:  25mm x 18mm preform oval and approximately 6.2 mm thick.  Weight = 6 g.  \u003c\/p\u003e\n\u003cp\u003eShown wet.  Not polished.  No known flaws.\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":40391144931441,"sku":"B094614","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PB094614Z.jpg?v=1700101867"},{"product_id":"montana-agate-rock-slab-454","title":"Montana Agate Rock Slab 454","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePREFORM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana, US\u003c\/p\u003e\n\u003cp\u003eDimensions:  25mm x 18mm preform oval and approximately 6.3 mm thick.  Weight = 7 g.  \u003c\/p\u003e\n\u003cp\u003eShown wet.  Not polished.  No known flaws.\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":40391167180913,"sku":"B094609","price":12.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PB094609a.jpg?v=1700102088"},{"product_id":"montana-agate-rock-slab-451","title":"Montana Agate Rock Slab 451","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePREFORM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana, US\u003c\/p\u003e\n\u003cp\u003eDimensions: 30mm x 40mm preform oval and approximately 6.2 mm thick.  Weight =17 g.  \u003c\/p\u003e\n\u003cp\u003eShown wet.  Not polished.  No known flaws.\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":40391183171697,"sku":"B094579","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PB094579z.jpg?v=1700102729"},{"product_id":"montana-agate-rock-slab-449","title":"Montana Agate Rock Slab 449","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePREFORM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana, US\u003c\/p\u003e\n\u003cp\u003eDimensions: 30mm x 40mm preform oval and approximately 6.2 mm thick.  Weight =17 g.  \u003c\/p\u003e\n\u003cp\u003eShown wet.  Not polished.  No known flaws.\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":40391187333233,"sku":"B094581","price":15.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PB094581z.jpg?v=1700103137"},{"product_id":"montana-agate-rock-slab-425","title":"Montana Agate Rock Slab 425","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 6.5\" x 1.75\" and is  approximately  7.9 mm thick.  Weight = 144 g.  \u003c\/p\u003e\n\u003cp\u003eShown wet.  Not polished.  Known flaws are shown as white lines in the final picture frame.\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":40432663134321,"sku":"B204707","price":16.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PB204707a.jpg?v=1702141605"},{"product_id":"montana-agate-rock-slab-424","title":"Montana Agate Rock Slab 424","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 6.25\" x 1.75\" and is  approximately  7.9 mm thick.  Weight = 126 g.  \u003c\/p\u003e\n\u003cp\u003eShown wet.  Not polished.  Known flaws are shown as white lines in the final picture frame.\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":40432663298161,"sku":"B204715","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PB204715a.jpg?v=1702141718"},{"product_id":"montana-agate-rock-slab-416","title":"Montana Agate Rock Slab 416","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 4\" x 1.5\" and is  approximately  6.9 mm thick.  Weight = 65 g.  \u003c\/p\u003e\n\u003cp\u003eShown wet.  Not polished.  Known flaws are shown as white lines in the final picture frame.\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":40432666443889,"sku":"B204684","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PB204684a.jpg?v=1702142605"},{"product_id":"montana-agate-rock-slab-389","title":"Montana Agate Rock Slab 387","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePREFORM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana, US\u003c\/p\u003e\n\u003cp\u003eDimensions: 38 mm preform round and approximately 6.3 mm thick.  Weight =22 g.  \u003c\/p\u003e\n\u003cp\u003eShown wet.  Not polished.  No known flaws.\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":40589084426353,"sku":"B094578","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PB094578X.jpg?v=1709061724"},{"product_id":"montana-agate-rock-slab-345","title":"Montana Agate Rock Slab 345","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2\" x 2\" and is  approximately 7.2 mm thick.  Weight = 45 g. \u003c\/p\u003e\n\u003cp\u003eN\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\" style=\"font-size: 0.875rem;\"\u003eKnown flaws are shown as white lines in the final picture frame. \u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41145601654897,"sku":"C135150","price":16.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PC135150a.jpg?v=1719334332"},{"product_id":"montana-agate-rock-slab-337","title":"Montana Agate Rock Slab 337","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 3.25\" x 1.5\" and is  approximately 5.1 mm thick.  Weight = 37 g. \u003c\/p\u003e\n\u003cp\u003eN\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. \u003cspan style=\"font-size: 0.875rem;\" data-mce-fragment=\"1\"\u003eNo known flaws.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41145644908657,"sku":"C135135","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PC135135a.jpg?v=1719335269"},{"product_id":"montana-agate-rock-slab-334","title":"Montana Agate Rock Slab 334","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2.5\" x 1.5\" and is  approximately 4.5 mm thick.  Weight = 22 g. \u003c\/p\u003e\n\u003cp\u003eN\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. \u003cspan style=\"font-size: 0.875rem;\" data-mce-fragment=\"1\"\u003eKnown flaws are shown as white lines in the final picture frame. This is a thin slab.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41145730728049,"sku":"A111126","price":12.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111126a.jpg?v=1719337719"},{"product_id":"montana-agate-rock-slab-331","title":"Montana Agate Rock Slab 331","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2.75\" x 2.25\" and is  approximately 6.1 mm thick.  Weight = 41 g. \u003c\/p\u003e\n\u003cp\u003eN\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known  significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41725144694897,"sku":"A111059","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111059aaa.jpg?v=1742154586"},{"product_id":"montana-agate-rock-slab-319","title":"Montana Agate Rock Slab 319","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2.5\" x 2.5\" and is  approximately 5.5 mm thick.  Weight = 44 g. \u003c\/p\u003e\n\u003cp\u003eN\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. No known significant flaws.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41725153345649,"sku":"P5135885","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P5135885a.jpg?v=1742156091"},{"product_id":"montana-agate-rock-slab-308-copy","title":"Montana Agate Rock Slab 307","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2\" x 1\" and is  approximately 7.7 mm thick.  Weight = 25 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. No known flaws.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944195137649,"sku":"3150411","price":9.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P3150411a.jpg?v=1747668769"},{"product_id":"montana-agate-rock-slab-306","title":"Montana Agate Rock Slab 306","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2.5\" x 2.75\" and is  approximately 7.2 mm thick.  Weight = 35 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944201592945,"sku":"3150357","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P3150357a.jpg?v=1747668866"},{"product_id":"montana-agate-rock-slab-300","title":"Montana Agate Rock Slab 300","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 3\" x 1.25\" and is  approximately 6.3 mm thick.  Weight = 29 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. No know flaws.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944229707889,"sku":"A111113","price":10.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111113a.jpg?v=1747669866"},{"product_id":"montana-agate-rock-slab-295","title":"Montana Agate Rock Slab 295","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2\" x 1.5\" and is  approximately 6.2 mm thick.  Weight = 25 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. No known flaws.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944239538289,"sku":"A111139","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111139a.jpg?v=1747670725"},{"product_id":"montana-agate-rock-slab-284","title":"Montana Agate Rock Slab 284","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 6\" x 2.5\" and is  approximately 6.4 mm thick.  Weight =102 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944258609265,"sku":"A111030","price":16.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111030a.jpg?v=1747671893"},{"product_id":"montana-agate-rock-slab-283","title":"Montana Agate Rock Slab 283","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2\" x 2\" and is  approximately 5.6 mm thick.  Weight =27 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. No known flaws.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944259068017,"sku":"A111145","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111145a.jpg?v=1747671977"},{"product_id":"montana-agate-rock-slab-281","title":"Montana Agate Rock Slab 281","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 3\" x 2\" and is  approximately 4.7 mm thick.  Weight =27 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame. This is a thin cut slab.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944261853297,"sku":"PA056757","price":15.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA056757a.jpg?v=1747672238"},{"product_id":"montana-agate-rock-slab-278","title":"Montana Agate Rock Slab 278","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 1.75\" x 2\" and is  approximately 5.8 mm thick.  Weight = 25 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. No known flaws.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944266211441,"sku":"A111123","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111123a.jpg?v=1747672501"},{"product_id":"montana-agate-rock-slab-277","title":"Montana Agate Rock Slab 277","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 3.75\" x 3\" and is  approximately 5.7 mm thick.  Weight = 81 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944266768497,"sku":"A111002","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111002a.jpg?v=1747672592"},{"product_id":"montana-agate-rock-slab-267","title":"Montana Agate Rock Slab 267","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2.5\" x1.5\" and is  approximately 5.9 mm thick.  Weight = 29 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. No known flaws.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944285118577,"sku":"A111120","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111120a.jpg?v=1747673803"},{"product_id":"montana-agate-rock-slab-264","title":"Montana Agate Rock Slab 264","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 3\" x 2.25\" and is  approximately 5.8 mm thick.  Weight = 55 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944290787441,"sku":"A111027","price":17.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111027a.jpg?v=1747674263"},{"product_id":"montana-agate-rock-slab-262","title":"Montana Agate Rock Slab 262","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 5\" x 2\" and is  approximately 6.5 mm thick.  Weight = 88 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944293048433,"sku":"A111045","price":21.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111045a.jpg?v=1747674453"},{"product_id":"montana-agate-rock-slab-258","title":"Montana Agate Rock Slab 258","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 3.75\" x 1.5\" and is  approximately 6.2 mm thick.  Weight = 57 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944305107057,"sku":"A111077","price":21.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111077a.jpg?v=1747674861"},{"product_id":"montana-agate-rock-slab-255","title":"Montana Agate Rock Slab 255","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 3.75\" x 2.5\" and is  approximately 4.5 mm thick.  Weight = 60 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.  This is a thin cut slab.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":41944313593969,"sku":"A111015","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA111015aaa.jpg?v=1747675294"},{"product_id":"montana-agate-rock-slab-246","title":"Montana Agate Rock Slab 246","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 3\" x 1.25\" and is  approximately 7.6 mm thick.  Weight = 45 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42227482001521,"sku":"7067117","price":12.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067117a.jpg?v=1753921520"},{"product_id":"montana-agate-rock-slab-243","title":"Montana Agate Rock Slab 243","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2.25\" x 1.75\" and is  approximately 7.1 mm thick.  Weight = 39 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42227487998065,"sku":"7067162","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067162a.jpg?v=1753921764"},{"product_id":"montana-agate-rock-slab-239","title":"Montana Agate Rock Slab 239","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2.75\" x 1.75\" and is  approximately 8.5 mm thick.  Weight = 51 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42227497009265,"sku":"7067066","price":12.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067066a.jpg?v=1753922132"},{"product_id":"montana-agate-rock-slab-237","title":"Montana Agate Rock Slab 237","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 2.25\" x 2.5\" and is  approximately 6.7 mm thick.  Weight = 50 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42227508281457,"sku":"7067108","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067108a.jpg?v=1753922345"},{"product_id":"montana-agate-rock-slab-236","title":"Montana Agate Rock Slab 236","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 4.25\" x 3\" and is  approximately 9 mm thick.  Weight = 161 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42227509854321,"sku":"7067114","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067114aa.jpg?v=1753922426"},{"product_id":"montana-agate-rock-slab-234","title":"Montana Agate Rock Slab 234","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 4\" x 2.5\" and is  approximately 8.3 mm thick.  Weight = 105 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42227513524337,"sku":"7067040","price":15.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067040a.jpg?v=1753922627"},{"product_id":"montana-agate-rock-slab-231","title":"Montana Agate Rock Slab 231","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 4\" x 1\" and is  approximately 7.1 mm thick.  Weight = 41 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42227516932209,"sku":"7067131","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067131a.jpg?v=1753922905"},{"product_id":"montana-agate-rock-slab-226","title":"Montana Agate Rock Slab 226","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDimensions: 3.25\" x 1.75\" and is  approximately 9 mm thick.  Weight = 74 g. \u003c\/p\u003e\n\u003cp\u003eShown wet. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42227529056369,"sku":"7067141","price":21.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067141a.jpg?v=1753923595"},{"product_id":"montana-agate-rock-slab-225","title":"Montana Agate Rock Slab S225","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTWO SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 3.5\" x 1.5\" and is each approximately 7 mm thick.  Total Weight = 93 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42234578370673,"sku":"7067035","price":24.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067035aa.jpg?v=1754247333"},{"product_id":"montana-agate-rock-slab-224","title":"Montana Agate Rock Slab S224","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTWO SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 4.5\" x 3.25\" and is each approximately 7.1 mm thick.  Total Weight = 314 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42234592723057,"sku":"7067033","price":29.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067033a.jpg?v=1754247508"},{"product_id":"montana-agate-rock-slab-223","title":"Montana Agate Rock Slab S223","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTWO SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 5.5\" x 1.75\" and is each approximately 4.5 mm thick.  Total Weight = 139 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42234595344497,"sku":"7067026","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067026a.jpg?v=1754247655"},{"product_id":"montana-agate-rock-slab-221","title":"Montana Agate Rock Slab S221","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTWO SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 4.5\" x 2\" and is each approximately 5.7 mm thick.  Total Weight = 134 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42234601144433,"sku":"7067030","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067030a.jpg?v=1754247912"},{"product_id":"montana-agate-rock-slab-217","title":"Montana Agate Rock Slab S217","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTWO SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 3.5\" x 2.5\" and is each approximately 6.6 mm thick.  Total Weight = 157 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42234623950961,"sku":"7067028","price":45.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067028a.jpg?v=1754249045"},{"product_id":"montana-agate-rock-slab-215","title":"Montana Agate Rock Slab S215","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTWO SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 4.5\" x 1.75\" and is each approximately 7.4 mm thick.  Total Weight = 150 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42234628243569,"sku":"7067029","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/P7067029a.jpg?v=1754249266"},{"product_id":"montana-agate-rock-slab-212","title":"Montana Agate Rock Slab S212","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTWO SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 3.5\" x 1\" and is each approximately 7.5 mm thick.  Total Weight = 70 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42682262782065,"sku":"A188687","price":21.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA188687a.jpg?v=1761588396"},{"product_id":"montana-agate-rock-slab-209","title":"Montana Agate Rock Slab S209","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTWO SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 2.75\" x 1\" and is each approximately 6.2 mm thick.  Total Weight = 46 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42682343653489,"sku":"A188688","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA188688a.jpg?v=1761589062"},{"product_id":"montana-agate-rock-slab-208","title":"Montana Agate Rock Slab S208","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTWO SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 2.25\" x 1.5\" and is each approximately 6.8 mm thick.  Total Weight = 63 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42682345521265,"sku":"A188694","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA188694a.jpg?v=1761589315"},{"product_id":"montana-agate-rock-slab-205","title":"Montana Agate Rock Slab S205","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTWO SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 2.5\" x 1\" and is each approximately 6.7 mm thick.  Total Weight = 50 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42682356662385,"sku":"A188699","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA188699a.jpg?v=1761589879"},{"product_id":"montana-agate-rock-slab-204","title":"Montana Agate Rock Slab S204","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTHREE SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 2.25\" x 1\" and is each approximately 7 mm thick.  Total Weight = 67 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42682362560625,"sku":"A188706","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA188706a.jpg?v=1761589998"},{"product_id":"montana-agate-rock-slab-201","title":"Montana Agate Rock Slab S201","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTHREE SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 3.5\" x 1.5\" and is each approximately 6.9 mm thick.  Total Weight = 157 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. Known significant flaws are shown as white lines in the final picture frame.\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42682370752625,"sku":"A188708","price":45.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA188708a.jpg?v=1761590307"},{"product_id":"montana-agate-rock-200","title":"Montana Agate Rock Slab S200","description":"\u003cp\u003eMontana agate has been a long time favorite of the lapidary enthusiast. Found in the alluvial gravels of the Yellowstone River in eastern Montana it has been collected and worked as a semiprecious stone for nearly a century. Noted for its clarity as well as its characteristic isolated black, and occasionally bright red dendrites, it makes excellent cabbing material. The majority of Montana agate pieces show a well-defined fortification pattern of black and brown as well as bright red\/orange. There are also variations of filament and tube patterns and a small percentage display an “iris” band in which minute, regularly spaced layers act as a diffusion grating and, like a prism, break light into a rainbow of color. It is a relatively easy material to work with, being quite hard, and takes a brilliant polish.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTWO SISTER SLABS THAT WILL MAKE PAIRED CABS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrigin:  Montana\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eApproximate Dimensions: 1.75\" x 1.75\" and is each approximately 6.4 mm thick.  Total Weight = 54 g. \u003c\/p\u003e\n\u003cp\u003eShown wet and backlit. N\u003cspan style=\"font-size: 0.875rem;\"\u003eot polished. No known flaws,\u003c\/span\u003e\u003c\/p\u003e","brand":"DD Rocks","offers":[{"title":"Default Title","offer_id":42682383728753,"sku":"A188692","price":21.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/files\/PA188692a.jpg?v=1761591072"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/2271\/collections\/Montana_agate.jpg?v=1639946821","url":"https:\/\/ddrockshop.com\/collections\/montana-agate\/montana-agate.oembed?page=2","provider":"DD Rocks","version":"1.0","type":"link"}