mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
AI-generated identification · may be incorrectHardness: 4 on Mohs scale; Color: Pale green to seafoam green; Luster: Vitreous (glassy); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral in four directions; Specific gravity: 3.175 to 3.184.
- Hardness
- 4 on Mohs scale
- Color
- Pale green to seafoam green
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 4 on Mohs scale; Color: Pale green to seafoam green; Luster: Vitreous (glassy); Crystal structure: Isometric (cubic); Cleavage: Perfect octahedral in four directions; Specific gravity: 3.175 to 3.184.
Formation & geological history
Forms primarily in hydrothermal veins, often associated with metallic ores like lead and silver. It can also be found in certain igneous and sedimentary environments where hot fluorine-rich fluids circulate through limestone.
Uses & applications
Used as a flux in steel making, in the production of hydrofluoric acid, special high-clarity lenses for telescopes and cameras, and widely as a decorative stone and semi-precious gemstone.
Geological facts
Fluorite is famous for the phenomenon of fluorescence, where it glows under ultraviolet light; the term 'fluorescence' was actually named after the mineral fluorite.
Field identification & locations
Identify by its characteristic hardness (can be scratched by a knife but not a copper penny) and its perfect four-way cleavage. Commonly found in China, Mexico, South Africa, and the USA (Illinois/Kentucky district). Collectors look for transparency and rich color saturation.
