mineral

Green Fluorite

Calcium fluoride (CaF2)

Hardness: 4 on Mohs scale; Color: bright green; Luster: vitreous (glassy); Crystal structure: isometric/cubic; Cleavage: perfect octahedral; Specific gravity: 3.18

Hardness: 4 on Mohs scale
Color: bright green
Luster: vitreous (glassy)

Identified July 20, 2026More mineral →

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Physical properties

Hardness: 4 on Mohs scale; Color: bright green; Luster: vitreous (glassy); Crystal structure: isometric/cubic; Cleavage: perfect octahedral; Specific gravity: 3.18

Formation & geological history

Formed through hydrothermal activity where hot, mineral-rich fluids circulate through fractures in rocks, typically associated with limestone or hydrothermal veins near igneous intrusions.

Uses & applications

Used as a flux in steelmaking, in the production of hydrofluoric acid for glass etching and chemical manufacturing, and as a gemstone for jewelry and ornamental carvings.

Geological facts

Fluorite is well-known for its property of fluorescence under UV light. It is often referred to as 'the most colorful mineral in the world' due to its wide range of hues caused by various impurities.

Field identification & locations

Identified in the field by its distinct cubic habit, its low hardness (it can be scratched by a knife), and its perfect four-way cleavage. Common locations include China, Mexico, South Africa, and the Illinois-Kentucky fluorspar district in the USA.