Fluorite with Quartz

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Only occasionally are these Quartz-coated Fluorite specimens seen from Silverton in the Animas District, San Juan County, Colorado, USA but they are fun pieces to have. Essentially an epimorph, but with the underlying green Fluorite still in place, the coating of bright white Quartz is very finely crystallized as a sugary layer. This small cabinet sized specimen comes from Arvid Pasto's famous Fluorite collection and interestingly gives the precise locality as Genoa Prospect, which is usually unspecified. This piece is dominated by a single, 2.2 cm wide, pyramid rising like a small snowy mountain above a plain of flatter Quartz. The edges and back of the specimen reveal the thicker bed of Fluorite which is encapsulated from above.