Dumortierite Rock Slab 41
Dumortierite is called the "blue denim stone." It is named for a French paleontologist, Eugène Dumortier, who discovered it in 1881 in the Rhône-Alps region of France. Its full name is “blue dumortierite quartz” – quartz referring to crystals composed of silica. It is found in numerous countries. Dumortierite is fairly hard (Mohs scale 7) and will take a nice polish. It is sometimes mistaken for sodalite and lapis lazuli. Because of the perceived similarity, dumortierite is often used as a cost-saving substitute for lapis which costs two to three times as much.
Dimensions: 3.75" x 3" and approximately 7.7 mm thick. Weight = 128 grams.
Shown wet. Not polished. No known flaws.
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