Kunzite
Spodumene var. Kunzite · Semi-Precious Gemstone / Collector Mineral
Crystal System
Monoclinic; typically prismatic, often with deep vertical striations and etched terminations
Mineral Group
Silicates; Pyroxene group (Inosilicate)
Chemical Formula
LiAlSi2O6 (Lithium Aluminum Silicate) with trace amounts of Mn3+ (Manganese)
Formation Process
Igneous; typically forms in lithium-rich granitic pegmatites under high-pressure and low-to-moderate temperature conditions
About This Crystal
Transparent to translucent pink-to-violet specimen shaped into a teardrop cabochon. Shows vitreous luster with characteristic internal splintery cleavage planes and distinct pleochroism
Physical Characteristics
Color: Lilac-pink; Streak: White; Cleavage: Perfect in two directions [110]; Fracture: Splintery to uneven; Specific Gravity: 3.16–3.20; Fluorescence: Strong orange to pink under LWUV
Optical Properties
Refractive Index: 1.660–1.676; Birefringence: 0.014–0.016; Pleochroism: Strong (Deep pink to colorless); Optical Phenomenon: Doubly refractive
Hardness & Durability
Origin Region
Notable sources include Nuristan Province (Afghanistan), Minas Gerais (Brazil), and San Diego County (California, USA)
Hardness & Durability
Mohs Hardness: 6.5–7.0; Toughness: Poor due to perfect cleavage; brittle and sensitive to thermal shock
Care & Maintenance
Avoid ultrasonic/steam cleaners. Clean with warm soapy water. Must be stored in darkness as color can fade significantly with prolonged exposure to sunlight (photosensitive)
Rarity & Value
Relatively rare; value is driven by color saturation (deeper pink/violet is more valuable) and size. Generally untreated, but some is irradiated to deepen color
Special Characteristics
Displays strong pleochroism where color is darkest when viewed down the length of the crystal; exhibits phosphorescence and may show rutilated inclusions or internal 'tubes'
Lore & History
Named after gemologist George Frederick Kunz in 1902. Historically significant as a modern discovery in California. Traditionally associated with the heart chakra and emotional healing