mineral

Green Fluorite (Fluorite Sphere)

Calcium Fluoride (CaF2)

Hardness: 4 on the Mohs scale; Color: Pale to deep green with translucent zones; Luster: Vitreous (glass-like); Crystal structure: Isometric (cubic), though polished here into a sphere; Cleavage: Perfect octahedral in four directions; Specific gravity: 3.175 to 3.184.

Hardness: 4 on the Mohs scale
Color: Pale to deep green with translucent zones
Luster: Vitreous (glass-like)

Identified March 24, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal activity where hot, mineral-rich fluids circulate through fractures in limestone or igneous rocks. Most deposits are found in veins and ranges in age from the Precambrian to the Cenozoic era.

Uses & applications

Used as a flux in steel making, in the production of hydrofluoric acid, and for high-quality camera and telescope lenses. Polished specimens like this sphere are highly popular in the metaphysical and gemstone collecting markets for decorative use.

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' because it can occur in every color of the rainbow.

Field identification & locations

Identify in the field by its distinct cubic crystal habit, its 4-point cleavage, and its softness (it can be scratched by a steel knife). Commonly found in China, Mexico, South Africa, and the Illinois-Kentucky fluorspar district in the USA. Collectors should avoid cleaning with acidic solutions.

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