mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Hardness: 4 (Mohs scale); Color: Pale green to emerald green; Luster: Vitreous (glassy); Crystal Structure: Isometric (cubic); Cleavage: Perfect octahedral in four directions; Specific Gravity: 3.01–3.25.

Hardness: 4 (Mohs scale)
Color: Pale green to emerald green
Luster: Vitreous (glassy)

Identified April 4, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal activity in veins where hot mineral-rich fluids circulate through crustal rocks. Often found in association with ores of lead, tin, or zinc. It can occur across many geological eras.

Uses & applications

Used as a flux in steelmaking and aluminum smelting (lowers melting points), in the production of hydrofluoric acid, as high-clarity lenses for telescopes/cameras, and for decorative carvings or jewelry.

Geological facts

The term 'fluorescence' is derived from fluorite because many specimens glow under ultraviolet light. It is also an essential industrial mineral despite its beauty.

Field identification & locations

Identify by its characteristic 4 directions of cleavage (forming octahedrons) and its relatively low hardness (can be scratched by a steel blade but not a penny). It is commonly found in China, Mexico, South Africa, and the USA (Illinois/Kentucky).