mineral

Green Fluorite

Calcium Fluoride (CaF2)

Hardness: 4 on Mohs scale; Color: Pale to mint green; Luster: Vitreous (glassy); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral in four directions; Specific Gravity: 3.17 to 3.56.

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

Identified July 6, 2026More mineral →

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Physical properties

Hardness: 4 on Mohs scale; Color: Pale to mint green; Luster: Vitreous (glassy); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral in four directions; Specific Gravity: 3.17 to 3.56.

Formation & geological history

Formed through hydrothermal activity, often in veins or as a gangue mineral in metallic ore deposits. It occurs in both igneous and sedimentary environments and can date back hundreds of millions of years depending on the specific deposit.

Uses & applications

Used as a flux in steel and aluminum smelting (fluorospar), in the manufacture of hydrofluoric acid, in high-performance telescope lenses, and widely as a decorative gemstone and collector specimen.

Geological facts

Fluorite was the first mineral for which the property of fluorescence was described; many specimens glow blue or purple 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 characteristic 4-way cleavage, relative softness (can be scratched by a steel knife but not a copper penny easily), and glassy luster. Found globally in locations like Mexico, China, South Africa, and the USA (Illinois/Kentucky).