Fluorite
Fluorite var. Purple and Green · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Cubic; often found as cubes or octahedrons. This specimen is polished into a prismatic point (obelisk) shape.
Mineral Group
Halides
Chemical Formula
CaF2 (Calcium Fluoride) with trace amounts of Rare Earth Elements (REE)
Formation Process
Hydrothermal; typically formed in veins ranging from low to high temperatures where hydrothermal fluids circulate through crustal rocks.
About This Crystal
A translucent to transparent polished point showing distinct color zoning of deep purple and pale greenish-white. It features internal fractures, veils, and cloudy inclusions with a vitreous (glass-like) luster.
Physical Characteristics
Color: Banded purple, green, and white; Streak: White; Cleavage: Perfect octahedral in four directions; Specific Gravity: 3.18; Fluorescence: Strong blue under UV light.
Optical Properties
Refractive Index: 1.434 (Isotropic); Birefringence: None (singly refractive); Dispersion: Low; Luster: Vitreous.
Hardness & Durability
Origin Region
Notable sources include China, Mexico, Brazil, South Africa, and the USA (Illinois/Kentucky).
Hardness & Durability
Mohs Hardness: 4.0; Brittle tenacity; Poor durability for rings but suitable for ornamental displays or pendants.
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid ultrasonic or steam cleaners. Sensitive to heat and acidic chemicals; store away from harder gems like quartz to prevent scratching.
Rarity & Value
Common; value is determined by color intensity, banding patterns, and size. Generally affordable, ranging from $10 to $50 for decorative points of this scale.
Special Characteristics
Color zoning (banding) and strong fluorescence. It is the defining mineral for level 4 on the Mohs scale.
Lore & History
Known historically as 'Fluorspar.' Ancient Egyptians used it for statues and scarabs. Metaphysically, it is associated with mental clarity, focus, and the Third Eye and Heart chakras.