mineral

Purple fluorite cluster

Fluorite (calcium fluoride, CaF₂)

AI-generated identification · may be incorrect

Typically purple, often zoning to white or colorless; vitreous luster, transparent to translucent, cubic crystals, perfect octahedral cleavage, and Mohs hardness 4. Specific gravity is about 3.18.

Identified August 18, 2026More mineral →

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Physical properties

Typically purple, often zoning to white or colorless; vitreous luster, transparent to translucent, cubic crystals, perfect octahedral cleavage, and Mohs hardness 4. Specific gravity is about 3.18.

Formation & geological history

Forms mainly in hydrothermal veins and cavities associated with limestone, dolostone, and metallic ore deposits. Most specimens formed during Phanerozoic mineralizing events, though age depends on locality.

Uses & applications

Used industrially as a flux in steel and aluminum production and as a source of hydrofluoric acid; attractive clusters are collected and occasionally used in carvings or cabochons.

Geological facts

Purple color commonly results from radiation-related color centers or trace impurities; crystal zoning and cubic or modified cubic forms are diagnostic.

Field identification & locations

Identify by its cubic habit, softness, perfect cleavage, and ability to scratch with a steel knife but not glass reliably. Major sources include China, Mexico, the United States, England, and Morocco.