mineral
Likely green fluorite
Fluorite (calcium fluoride, CaF₂)
AI-generated identification · may be incorrectThe specimen appears translucent green with a vitreous-to-dull luster, but the photo does not show diagnostic crystal faces or cleavage. Fluorite has Mohs hardness 4, cubic crystal structure, perfect octahedral cleavage, and specific gravity about 3.2.
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Physical properties
The specimen appears translucent green with a vitreous-to-dull luster, but the photo does not show diagnostic crystal faces or cleavage. Fluorite has Mohs hardness 4, cubic crystal structure, perfect octahedral cleavage, and specific gravity about 3.2.
Formation & geological history
Fluorite commonly crystallizes from hydrothermal fluids in veins and cavities, often alongside quartz, calcite, or sulfide ores. Its age depends on the deposit and cannot be determined from appearance alone.
Uses & applications
Used as an industrial flux and source of fluorine; attractive, clear pieces are cut or collected as display specimens.
Geological facts
Fluorite can fluoresce under ultraviolet light, a phenomenon named after the mineral.
Field identification & locations
Green color alone is not conclusive; test cautiously for hardness and cleavage, or consult a mineral specialist. Fluorite occurs worldwide, including China, Mexico, and the United States.
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