mineral
Green Fluorite
Calcium Fluoride (CaF2)
Hardness 4 on Mohs scale, vitreous to glassy luster, isometric/cubic crystal system, perfect octahedral cleavage in four directions, translucence to transparency, soft sea-green to emerald green color.
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Physical properties
Hardness 4 on Mohs scale, vitreous to glassy luster, isometric/cubic crystal system, perfect octahedral cleavage in four directions, translucence to transparency, soft sea-green to emerald green color.
Formation & geological history
Forms through hydrothermal processes in vein deposits, often alongside quartz, calcite, and metallic ores, as well as in pegmatites and sedimentary rocks.
Uses & applications
Used in metallurgy as a flux (smelting), chemical industry (fluorine production, hydrofluoric acid), high-performance optical lenses, lapidary carvings, and decorative mineral specimens.
Geological facts
Fluorite gave its name to the phenomenon of fluorescence, as many specimens glow strongly under ultraviolet light due to trace rare-earth elements. It soft enough to easily scratch with a steel nail.
Field identification & locations
Identified by its triangular cleavage planes (often forming octahedral shapes when broken), soft hardness (4), vitreous luster, and strong reaction (glowing) under UV light. Commonly found in China, Mexico, South Africa, England, and the USA.
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