mineral

Green Fluorite

Fluorite (Calcium Fluoride - CaF2)

Hardness: 4 (Mohs scale); Color: Pale to deep emerald green; Luster: Vitreous (glassy); Crystal Structure: Isometric/Cubic; Cleavage: Perfect octahedral in four directions; Specific Gravity: 3.175–3.56

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

Identified March 29, 2026More mineral →

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Physical properties

Formation & geological history

Primarily formed through hydrothermal activity where hot mineral-rich fluids circulate through fractures in limestone or igneous rocks. Most commercial deposits date from the Paleozoic to Mesozoic eras.

Uses & applications

Used as a flux in steel making (metallurgy), production of hydrofluoric acid, high-clarity lenses for telescopes and cameras, and widely as a decorative gemstone or lapidary material for carvings.

Geological facts

Fluorite is the origin of the term 'fluorescence' because many specimens glow blue or violet under UV light. It is often called 'the most colorful mineral in the world' due to the wide range of impurities that can tint its crystals.

Field identification & locations

Identify in the field by its characteristic 4-way octahedral cleavage, glass-like luster, and its inability to scratch glass but ease of being scratched by a knife. Found globally with major deposits in China, Mexico, South Africa, and Illinois, USA.