mineral

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Hardness: 4 on Mohs scale; Color: Pale green (translucent); Luster: Vitreous (glassy); Crystal structure: Isometric (cubic or octahedral cleavage); Cleavage: Perfect octahedral in four directions; Specific Gravity: 3.18

Hardness: 4 on Mohs scale
Color: Pale green (translucent)
Luster: Vitreous (glassy)

Identified March 21, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal activity where hot, fluorine-rich fluids circulate through host rocks like limestone or granite. It is commonly found in veins or as a gangue mineral in metallic ore deposits.

Uses & applications

Industrial uses include acting as a flux for smelting steel (smelting and refining), the manufacture of hydrofluoric acid, and high-quality optical lenses. It is also popular in decorative carvings and jewelry.

Geological facts

Fluorite gave its name to the phenomenon of 'fluorescence' because many specimens glow under ultraviolet light. It is often referred to as 'the most colorful mineral in the world'.

Field identification & locations

Identify in the field by its 4-way octahedral cleavage, its ability to be scratched by a steel knife but not a copper penny, and its glassy luster. Common locations include China, Mexico, South Africa, and Illinois, USA.