mineral
Purple fluorite
Fluorite (calcium fluoride, CaF₂)
AI-generated identification · may be incorrectMohs hardness 4; translucent to transparent purple with vitreous luster and cubic crystal structure. The prominent flat surfaces and stepped fractures reflect fluorite’s perfect octahedral cleavage in four directions.
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Physical properties
Mohs hardness 4; translucent to transparent purple with vitreous luster and cubic crystal structure. The prominent flat surfaces and stepped fractures reflect fluorite’s perfect octahedral cleavage in four directions.
Formation & geological history
Forms when hot, mineral-rich fluids deposit calcium fluoride in veins and cavities, often with quartz, calcite, or sulfide minerals. Fluorite deposits occur across many geological ages and settings.
Uses & applications
Used as a source of fluorine for chemical and metallurgical industries; attractive crystals are collected and occasionally cut for jewelry, though its softness limits wearability.
Geological facts
Fluorite commonly fluoresces under ultraviolet light; the phenomenon was named after the mineral.
Field identification & locations
Identify by its purple color, cubic crystal habit, glassy luster, and easy cleavage into octahedral fragments. Major sources include China, Mexico, the United States, and England; this specimen appears to be a large, cleaved crystal cluster.
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