mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Hardness: 4 on Mohs scale; Color: Mint green to deep emerald green; Luster: Vitreous (glass-like); Crystal structure: Isometric (cubic/octahedral); Cleavage: Perfect octahedral; Specific gravity: 3.18

Hardness: 4 on Mohs scale
Color: Mint green to deep emerald green
Luster: Vitreous (glass-like)

Identified April 12, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal activity, often as a vein mineral in carbonate rocks or as an accessory in igneous rocks. It precipitates from hot, mineral-rich fluids circulating through the Earth's crust.

Uses & applications

Used as a flux in steelmaking (fluorospar), in the manufacture of hydrofluoric acid, in high-performance optical lenses, and as a popular semi-precious gemstone for jewelry and collecting.

Geological facts

Fluorite is famous for the phenomenon of 'fluorescence,' which was named after the mineral itself. Under UV light, many specimens glow a vibrant blue or purple.

Field identification & locations

Identify by its distinctive glassy luster, green transparency, and perfect 4-directional cleavage. It is softer than glass and can be scratched by a knife or steel nail. Common locations include China, Mexico, South Africa, and Illinois in the USA.