Fluorite
Fluorite (Calcium Fluoride) · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Cubic (Isometric), typically forming cubic, octahedral, or dodecahedral crystals, often massive or tumbled
Mineral Group
Halides
Chemical Formula
CaF2
Formation Process
Hydrothermal processes in veins associated with lead, zinc, silver, and barite ores, as well as in cavities of carbonate rocks.
About This Crystal
A polished, tumbled stone displaying deep purple, violet, and dark banding with translucent to opaque sections and a vitreous luster.
Physical Characteristics
Color ranges from purple, green, yellow, to clear; streak is white; perfect octahedral cleavage; specific gravity around 3.18; brittle tenacity; often exhibits strong blue or violet fluorescence under UV light.
Optical Properties
Isotropic (singly refractive), low refractive index of approximately 1.434, no pleochroism due to cubic crystal system.
Hardness & Durability
Origin Region
Global distribution including China, Mexico, South Africa, UK, and USA. Found in hydrothermal veins and sedimentary deposits.
Hardness & Durability
Mohs hardness of 4, making it relatively soft and easily scratched. Poor toughness due to perfect cleavage. Not ideal for daily wear rings.
Care & Maintenance
Clean with mild soapy water and a soft cloth. Avoid ultrasonic cleaners, harsh chemicals, and prolonged exposure to direct sunlight which can fade colors.
Rarity & Value
Common mineral worldwide, highly variable in price depending on specimen size, color intensity, and clarity. Tumbled stones are widely accessible and affordable.
Special Characteristics
Renowned for strong fluorescence under ultraviolet light, which gave the phenomenon of 'fluorescence' its name.
Lore & History
Historically used for carved ornaments and vases due to its softness and vibrant banding. In modern metaphysical practices, it is associated with mental clarity, focus, and the third eye chakra.