mineral

Fluorite (likely green-purple fluorite)

Fluorite, CaF₂

AI-generated identification · may be incorrect

Translucent green and purple zoning with vitreous luster and prominent cubic cleavage; Mohs hardness 4, isometric crystal system, specific gravity about 3.0–3.2. The specimen appears naturally cleaved or roughly broken, not a finished gemstone.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Forms when fluoride-rich hydrothermal fluids crystallize in veins and cavities, often alongside quartz, calcite, or sulfide ores; deposits range from ancient to geologically recent.

Uses & applications

Used as a source of fluorine for chemical and metallurgical industries; attractive pieces are collected or cut for display and jewelry, though its softness limits wear.

Geological facts

Fluorite commonly shows distinct color zoning, and some varieties fluoresce under ultraviolet light. Its perfect octahedral cleavage can produce smooth, reflective faces.

Field identification & locations

The green-purple color zoning and cleavage are consistent with fluorite; confirm with a hardness test (it should scratch readily with a steel point) and avoid relying on color alone. Found worldwide, including China, Mexico, England, and the United States.