Fluorite
Fluorite (Fluorospar) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Cubic (Isometric); common habits include cubes, octahedrons, and more rarely dodecahedrons. This specimen is shaped as a polished pyramid.
Mineral Group
Halides
Chemical Formula
CaF2 (Calcium Fluoride)
Formation Process
Primarily Hydrothermal; forms from fluids rising in the Earth's crust, often in limestone or as an accessory mineral in igneous rocks.
About This Crystal
Green variety with a vitreous (glassy) luster. This specific piece is a polished, translucent to semi-opaque green pyramid with a smooth surface.
Physical Characteristics
Color: Pale to deep green; Streak: White; Cleavage: Perfect octahedral in four directions; Specific Gravity: 3.18; Fluorescence: Strong under UV light (typically blue).
Optical Properties
Refractive Index: 1.433 (Singly Refractive/Isotropic). Low dispersion and no pleochroism.
Hardness & Durability
Origin Region
Major sources include China, Mexico, South Africa, and Illinois, USA. Forms in hydrothermal veins and sedimentary deposits.
Hardness & Durability
Mohs Hardness: 4. Very soft and brittle; prone to scratching and fracturing. Not suitable for high-wear jewelry.
Care & Maintenance
Clean only with warm soapy water. Avoid ultrasonic cleaners, steam, and harsh chemicals. Store away from harder stones like quartz to prevent scratches.
Rarity & Value
Relatively common. Value is determined by color intensity and clarity. Often inexpensive as a decorative mineral or polished shape.
Special Characteristics
Known for thermoluminescence and strong fluorescence. Its name is the origin of the term 'fluorescence'.
Lore & History
Historically used by ancient Egyptians for statues and scarabs. Modernly associated with focus, clarity, and the Heart Chakra.