mineral
Green Fluorite
Calcium Fluoride (CaF2)
Hardness: 4 (Mohs scale), Color: Deep green to bluish-green, Luster: Vitreous, Crystal Structure: Cubic/Isometric, Cleavage: Perfect octahedral, Specific Gravity: 3.18
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Physical properties
Hardness: 4 (Mohs scale), Color: Deep green to bluish-green, Luster: Vitreous, Crystal Structure: Cubic/Isometric, Cleavage: Perfect octahedral, Specific Gravity: 3.18
Formation & geological history
Formed in hydrothermal veins through cooling mineral-rich water, often in association with lead and zinc ores. It can occur in high-temperature environments or as a secondary mineral in limestone.
Uses & applications
Used as a flux in steel making, in the production of hydrofluoric acid, in optical lenses for cameras and telescopes, and as a popular semi-precious gemstone for jewelry and carvings.
Geological facts
Fluorite is often called 'the most colorful mineral in the world'. It is the origin of the term 'fluorescence' because many specimens glow under ultraviolet light.
Field identification & locations
Identified by its characteristic cubic crystals, octahedral cleavage, and softness (can be scratched by a knife but not a copper penny). Common in China, Mexico, South Africa, and the USA.
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sedimentary
Schist
Schist
Metamorphic
Epidote
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metamorphic
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
![Biotite Schist (Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]) — metamorphic](https://media.rock.id/9ca564b5-bc87-402b-965a-69b21f9aa6bf-thumbnail.jpg)
Biotite Schist
Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]
metamorphic