mineral

Green Fluorite

Calcium Fluoride (CaF2)

Hardness: 4 (Mohs scale); Color: Emerald green; Luster: Vitreous to sub-vitreous; Crystal system: Isometric/Cubic; Cleavage: Perfect octahedral; Specific gravity: 3.18

Hardness: 4 (Mohs scale)
Color: Emerald green
Luster: Vitreous to sub-vitreous

Identified July 13, 2026More mineral →

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Physical properties

Hardness: 4 (Mohs scale); Color: Emerald green; Luster: Vitreous to sub-vitreous; Crystal system: Isometric/Cubic; Cleavage: Perfect octahedral; Specific gravity: 3.18

Formation & geological history

Forms primarily as a hydrothermal mineral in veins, often associated with metallic ores. It can also occur in sedimentary rocks as a cementing material or in igneous rocks like pegmatites.

Uses & applications

Used as a flux in steel making, in the manufacture of hydrofluoric acid, as high-performance lenses for telescopes/cameras, and for decorative carvings or jewelry.

Geological facts

Fluorite is often called 'the most colorful mineral in the world'. It is the origin of the term 'fluorescence' because many specimens glow under ultraviolet light.

Field identification & locations

Identify in the field by its distinct 4-directional cleavage and its relatively low hardness (easily scratched by a pocket knife). Common locations include China, Mexico, and the United Kingdom.