mineral
Green Fluorite
Calcium Fluoride (CaF2)
Mohs hardness of 4, vitreous luster, isometric crystal system, octahedral cleavage, color ranges from pale to deep green, transparent to translucent.
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Physical properties
Mohs hardness of 4, vitreous luster, isometric crystal system, octahedral cleavage, color ranges from pale to deep green, transparent to translucent.
Formation & geological history
Forms primarily in hydrothermal veins, often associated with metallic minerals like lead and silver ores. It occurs in a variety of geological environments from sedimentary to igneous.
Uses & applications
Used as a flux in steel and aluminum processing, in the manufacture of hydrofluoric acid, in high-performance optical lenses, and as a popular semi-precious gemstone for decorative carvings and jewelry.
Geological facts
Fluorite is the origin of the term 'fluorescence' because many specimens glow under ultraviolet light. It is often called 'the most colorful mineral in the world'.
Field identification & locations
Identifiable by its softness (can be scratched by a steel knife), perfect cleavage, and cubic or octahedral crystal habits. Commonly found in China, Mexico, South Africa, and the USA (Illinois/Kentucky).
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock