mineral
Green Fluorite
Calcium Fluoride (CaF2)
AI-generated identification · may be incorrectHardness 4 on Mohs scale, vitreous to glassy luster, isometric/cubic crystal system, perfect 4-directional octahedral cleavage, pale green to sea-green translucency, specific gravity ~3.18.
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Physical properties
Hardness 4 on Mohs scale, vitreous to glassy luster, isometric/cubic crystal system, perfect 4-directional octahedral cleavage, pale green to sea-green translucency, specific gravity ~3.18.
Formation & geological history
Hydrothermal mineral formed in veins and fractures of limestone and granite by fluorine-bearing fluids reacting with calcium-rich rocks.
Uses & applications
Used as a flux in steelmaking and smelting, production of hydrofluoric acid, high-grade optical lenses, lapidary carvings, and mineral collecting.
Geological facts
Fluorite glows under ultraviolet light, a phenomenon named 'fluorescence' after this very mineral. It comes in almost every color of the rainbow, but green is one of the most classic varieties.
Field identification & locations
Identified by its softness (can be scratched by glass/steel blade), distinct cleavage planes, cubic crystal habits, and glassy, sub-translucent green appearance. Commonly found in China, Mexico, South Africa, England, and Illinois (USA).
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Other mineral specimens
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Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous