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Rock guide

Fluorite (purple)

mineral · common

Quick facts

The specimen shows prismatic crystals with vitreous luster, conchoidal breakage and no obvious cleavage, and is transparent–translucent; purple. Purple fluorite is a main lookalike, but it typically forms cubes or octahedra and shows four perfect cleavages that part easily—features not seen here. A quick hardness test (fluorite ~4) versus quartz (7) separates them immediately.

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