mineral

Green Fluorite

Calcium Fluoride (CaF2)

Hardness: 4 (Mohs scale); Color: Pale to deep green; Luster: Vitreous; Crystal system: Isometric (cubic); Cleavage: Perfect octahedral; Specific gravity: 3.18

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

Identified July 21, 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: 3.18

Formation & geological history

Formed through hydrothermal activity, often in veins or together with metallic ores. It can be found in sedimentary environments or as an accessory mineral in igneous rocks like granite.

Uses & applications

Used as a flux in steel making, in the production of hydrofluoric acid, in high-performance telescopes and camera lenses, and widely used in jewelry and lapidary art.

Geological facts

Fluorite is famous for its wide range of colors and its ability to fluoresce under ultraviolet light. The term 'fluorescence' is actually derived from the mineral name fluorite.

Field identification & locations

Identify by its characteristic cubic structure, range of colors, and softness (it can be scratched by a knife). Commonly found in Mexico, China, South Africa, and the USA (Illinois/Kentucky). Collectors look for clarity and sharp crystal edges.