mineral
Green Fluorite
Calcium Fluoride (CaF2)
Mohs hardness of 4, typically green, vitreous luster, isometric crystal system, perfect octahedral cleavage, specific gravity of 3.18
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Physical properties
Mohs hardness of 4, typically green, vitreous luster, isometric crystal system, perfect octahedral cleavage, specific gravity of 3.18
Formation & geological history
Forms in hydrothermal veins, often associated with metallic ores like lead and zinc, as well as in pegmatites and dolomites.
Uses & applications
Used in metallurgy as a flux, manufacturing of hydrofluoric acid, optical lenses, and as a popular ornamental and collectible specimen.
Geological facts
Fluorite is the defining mineral for a hardness of 4 on the Mohs scale. It exhibits strong fluorescence under ultraviolet light in many cases, which is where the term 'fluorescence' originates.
Field identification & locations
Easily identified by its relatively low hardness (can be scratched by a knife easily) and perfect cleavage. Major deposits are found in China, Mexico, South Africa, and the USA.
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