Fluorite

Unknown Owner

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This is a very rare combination from the mine, with a deep purple fluorite (perfect and complete, mind you) richly included by acicular crystals of the rare species bismuthinite. It looks like silver hairs inside the fluorite. Once, these were labeled stibnite or cosalite but I have seen them labeled bismuthinite in recent years though I have not analyzed it myself. Now, I am told most people label them stibnite but I am not aware of an analysis I can cite. Minute bits of chalcopyrite are in association on the bottom of the piece. Except for a contact on bottom, a slight one at that, the cube is complete. So far as I know, this is a unique association to this mine.