mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

AI-generated identification · may be incorrect

Hardness: 4 (Mohs scale); Color: Pale to deep green; Luster: Vitreous; Crystal system: Isometric/Cubic; Cleavage: Perfect octahedral; Specific gravity: 3.175-3.56

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

Identified June 7, 2026More mineral →

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Physical properties

Hardness: 4 (Mohs scale); Color: Pale to deep green; Luster: Vitreous; Crystal system: Isometric/Cubic; Cleavage: Perfect octahedral; Specific gravity: 3.175-3.56

Formation & geological history

Formed through hydrothermal activity, typically in veins within carbonate rocks or as an accessory mineral in igneous rocks like granite. It often forms from hot, mineral-rich fluids escaping from cooling magma.

Uses & applications

Used as a flux in steel making, in the production of hydrofluoric acid, in high-performance telescope and camera lenses, and widely in the gemstone and ornamental carving trade (like this mushroom shape).

Geological facts

Fluorite is the origin of the term 'fluorescence' because many specimens glow under UV light. It is often called 'the most colorful mineral in the world' due to the wide range of hues it can take.

Field identification & locations

Identify by its softness (can be scratched by a knife but not a copper penny) and its characteristic 4-way octahedral cleavage. Often found near lead and silver ores in places like China, Mexico, and Illinois, USA.