mineral
Purple fluorite
Fluorite (calcium fluoride, CaF₂)
AI-generated identification · may be incorrectUsually Mohs hardness 4; this specimen is translucent lavender-purple with a vitreous luster and apparent cleavage faces. Fluorite crystallizes in the cubic system and has four directions of perfect octahedral cleavage.
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Physical properties
Usually Mohs hardness 4; this specimen is translucent lavender-purple with a vitreous luster and apparent cleavage faces. Fluorite crystallizes in the cubic system and has four directions of perfect octahedral cleavage.
Formation & geological history
Forms in hydrothermal veins and cavities, often alongside quartz, calcite, or metallic ores. Fluorite deposits occur in rocks of many ages; the specimen’s age and exact locality cannot be determined from the image.
Uses & applications
Used as an industrial flux and source of fluorine compounds; transparent, colorful crystals are collected and occasionally cut for jewelry, though softness limits wearability.
Geological facts
Fluorite commonly fluoresces under ultraviolet light, a phenomenon named after the mineral.
Field identification & locations
Identify it by its purple color, glassy appearance, and distinctive octahedral cleavage; common sources include China, Mexico, England, and the United States. The image appears to show a small rough fragment on a countertop.
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