Green Fluorite
Fluorite (Calcium Fluoride) · Mineral Specimen / Semi-Precious Gemstone
Crystal System
Cubic; Habit shown is massive/cleavage fragment with stepped surfaces
Mineral Group
Halides
Chemical Formula
CaF2 with possible traces of Fe or Rare Earth Elements (REE) for color
Formation Process
Hydrothermal precipitation in veins, often as a gangue mineral associated with metallic ores
About This Crystal
Translucent to transparent pale green specimen with a vitreous to sub-vitreous luster and visible internal fractures
Physical Characteristics
Color: Mint green; Streak: White; Fracture: Sub-conchoidal to uneven; Specific Gravity: 3.175-3.184; Fluorescence: Strong blue-violet under UV
Optical Properties
Refractive Index: 1.434 (Isotropic/Singly Refractive); Low dispersion (0.007)
Hardness & Durability
Origin Region
Notable sources include China, Mexico, South Africa, and the UK (Rogerley Mine); forms in hydrothermal veins
Hardness & Durability
Mohs Hardness: 4 (Reference mineral for 4); Poor toughness due to perfect octahedral cleavage; brittle
Care & Maintenance
Clean with warm soapy water only; avoid ultrasonic/steam; sensitive to heat and strong acids; color may fade in direct sunlight
Rarity & Value
Common mineral; affordable value; prized for color and clarity; often untreated but may be oiled or irradiated
Special Characteristics
Features 4 directions of perfect cleavage; prominent fluorescence under UV light is common
Lore & History
Used historically by Egyptians for statues and vases; traditionally associated with the Heart Chakra and mental clarity/focus