mineral

Green Fluorite

Calcium fluoride (CaF2)

Hardness: 4 (Mohs scale), Color: Pale to mint green, Luster: Vitreous/glassy, Crystal structure: Isometric (often cubic or octahedral), Cleavage: Perfect octahedral, Specific gravity: 3.175–3.184

Identified July 21, 2026More mineral →

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Physical properties

Hardness: 4 (Mohs scale), Color: Pale to mint green, Luster: Vitreous/glassy, Crystal structure: Isometric (often cubic or octahedral), Cleavage: Perfect octahedral, Specific gravity: 3.175–3.184

Formation & geological history

Formed in hydrothermal veins frequently associated with metallic ores like lead and silver. It crystallizes from hot saline fluids as they cool while ascending through the Earth's crust.

Uses & applications

Used as a flux for smelting in steel production, in the manufacture of hydrofluoric acid, in high-performance telescopes/camera lenses (due to low dispersion), and as a popular semi-precious gemstone for jewelry and carvings.

Geological facts

Fluorite is famous for its fluorescence under UV light, a property named after the mineral itself. It is often called 'the most colorful mineral in the world'.

Field identification & locations

Identified in the field by its distinct green color, glassy luster, and low hardness (can be scratched by a pocket knife). It features perfect four-directional cleavage that results in characteristic octahedral fragments.