Fluorite
Fluorite · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Cubic (Isometric), typically forms cubes, octahedral crystals, or massive and banded aggregates
Mineral Group
Halides
Chemical Formula
CaF2
Formation Process
Hydrothermal processes, crystallizing from fluorine-bearing solutions at low to moderate temperatures in veins and cavities
About This Crystal
A polished, tumbled cabochon showing distinct deep blue, purple, and greenish-white chevron or banded zoning patterns. It has a vitreous luster when polished and translucent to opaque light transmission.
Physical Characteristics
Color ranges across purple, blue, green, and clear bands; white streak; perfect octahedral cleavage in four directions; conchoidal to uneven fracture; specific gravity around 3.18; brittle tenacity; often exhibits strong blue or violet fluorescence under UV light.
Optical Properties
Singly refractive (isotropic), refractive index of approximately 1.434, no pleochroism due to the cubic crystal system.
Hardness & Durability
Origin Region
China, Mexico, South Africa, UK, USA; found in hydrothermal veins and carbonate host rocks
Hardness & Durability
Mohs hardness of 4, making it relatively soft and easily scratched. Low toughness with distinct cleavage, requiring care when worn as jewelry.
Care & Maintenance
Clean with warm soapy water only; avoid ultrasonic cleaners, steam, harsh chemicals, and prolonged exposure to direct sunlight which can fade its color.
Rarity & Value
Common mineral worldwide, though high-clarity gem-grade material or rare color zones can command higher collector values. Typically very affordable.
Special Characteristics
Strong fluorescence under ultraviolet light, and occasionally exhibits thermoluminescence and triboluminescence.
Lore & History
Historically used for carving ornamental objects since ancient Roman times. In modern metaphysical practices, fluorite is known as the 'Genius Stone,' associated with mental clarity, focus, and balancing the third eye chakra.