Green Fluorite
Fluorite (IMA-approved name); Calcium Fluoride · Collector Mineral / Semi-Precious Gemstone
Crystal System
Cubic (Isometric); commonly forms octahedral or cubic crystals, though this specimen shows a massive/cleaved habit
Mineral Group
Halides; Fluorite group
Chemical Formula
CaF2 (Calcium Fluoride) with trace Rare Earth Elements (REEs) influencing color
Formation Process
Hydrothermal; forms via the circulation of hot, fluorine-rich fluids through fractures in rock or during the cooling of igneous intrusions.
About This Crystal
Translucent pale green specimen with a vitreous to sub-vitreous luster. Shows internal fracturing and a distinct blocky cleavage characteristic of the species.
Physical Characteristics
Color: Mint green; Streak: White; Cleavage: Perfect octahedral (in four directions); Fracture: Subconchoidal to uneven; Specific Gravity: 3.18; Fluorescence: Strong blue-violet under UV.
Optical Properties
Refractive Index: 1.432-1.435; Isotropic (singly refractive); low dispersion; no pleochroism.
Hardness & Durability
Origin Region
Notable sources include China, Mexico, South Africa, and the UK (Durham). Typically found in hydrothermal veins and sedimentary deposits.
Hardness & Durability
Mohs Hardness: 4 (Reference mineral for 4). Very brittle with perfect cleavage, making it fragile for jewelry use (low durability).
Care & Maintenance
Avoid ultrasonic cleaners and steam. Clean with warm soapy water only. Store separately from harder stones like quartz. Sensitive to heat and prolonged sunlight.
Rarity & Value
Common; Value is determined by color saturation and crystal perfection. Generally affordable. Some specimens may be irradiated to enhance color.
Special Characteristics
Displays strong fluorescence (the phenomenon was named after this mineral). Noted for its perfect octahedral cleavage planes.
Lore & History
Historically used in metallurgy as a flux. In metaphysical lore, it is associated with the Heart Chakra and believed to help with mental clarity and focus.