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Binghamite Rock Slab 02

  • 2995


Binghamite, also known as silkstone and cuynite, is a type of agate that was found near iron ore deposits in the Cuyuna iron range near Crosby, Minnesota and is named after William Bingham who discovered it in 1936.   Mining has been discontinued for a number of years so the stone has become increasingly rare and sought after by lapidary enthusiasts and collectors.  Binghamite displays areas of chatoyant red, gold, and black similar to pietersite or tiger eye.  When the pattern runs in level bands it is referred to as silkstone and when they run in all directions it is Binghamite.

Origin:  Minnesota

Dimensions:  6.5" x 3" and is approximately 6.2 mm thick.  Weight = 276 g. 

Not polished.  Shown wet.  Flaws are shown as white lines in the final picture frame.


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