Green Fluorite

Physical Properties

Hardness: 4 (Mohs scale); Color: Mint to emerald green; Luster: Vitreous (glassy); Crystal structure: Isometric (often cubic or octahedral); Cleavage: Perfect octahedral in four directions; Specific gravity: 3.1

Formation & Geological History

Formed through hydrothermal activity, often in veins or as a gangue mineral in metallic ore deposits. It occurs in various geological environments from volcanic settings to sedimentary limestone basins.

Uses & Applications

Used as a flux in steel making, in the manufacture of opalescent glass, and as a source of fluorine for hydrofluoric acid. High-quality specimens are used in jewelry (as beads or cabochons) and as decorative collectibles.

Geological Facts

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

Field Identification & Locations

Identify in the field by its distinct green color, glassy luster, and relatively low hardness (can be scratched by a steel knife). Look for its characteristic four directions of perfect cleavage.

Identified on: 4/22/2026

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