mineral
Fluorite
Calcium fluoride (CaF2)
AI-generated identification · may be incorrectHardness: 4 (Mohs), Color: purple and green banding, Luster: Vitreous/glassy, Crystal structure: Isometric (cubic), Cleavage: Perfect octahedral, Specific gravity: 3.17-3.56
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Physical properties
Hardness: 4 (Mohs), Color: purple and green banding, Luster: Vitreous/glassy, Crystal structure: Isometric (cubic), Cleavage: Perfect octahedral, Specific gravity: 3.17-3.56
Formation & geological history
Formed through hydrothermal activity in veins and within sedimentary rocks such as limestone. It often crystallizes as a byproduct of volcanic and hot spring activity.
Uses & applications
Used as a flux in steelmaking, in the production of hydrofluoric acid and aluminum, for high-performance camera lenses, and widely as a decorative gemstone and for carvings.
Geological facts
Fluorite exhibits the phenomenon of fluorescence where it glows under ultraviolet light. It is often called 'the most colorful mineral in the world'.
Field identification & locations
Identified by its distinctive 4-way cleavage and cubic crystals. Commonly found in China, Mexico, South Africa, and the USA (Illinois). Collectors look for well-defined cubes and distinct color zoning.
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Epidote
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Granite (Phaneritic intrusive igneous rock)
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