Kunzite
Spodumene var. Kunzite · Semi-Precious Gemstone
Crystal System
Monoclinic system, prismatic habit
Mineral Group
Silicates (Inosilicates)
Chemical Formula
LiAl(SiO3)2
Formation Process
Pegmatitic, forming in lithium-rich granitic pegmatites under high pressure and temperature conditions
About This Crystal
A translucent to transparent, pale pink to lilac colored gemstone with a vitreous luster, exhibiting distinct striations along its prismatic length and showing internal fractures and characteristic pleochroism.
Physical Characteristics
Light pink to violet body color, white streak, perfect prismatic cleavage in two directions at roughly 87 and 93 degrees, uneven to conchoidal fracture, specific gravity of approximately 3.14 to 3.20, brittle tenacity, and weak orange to red fluorescence under longwave UV light.
Optical Properties
Biaxial (+) with refractive indices of nalpha = 1.660 - 1.667, nbeta = 1.665 - 1.672, ngamma = 1.675 - 1.682; strong trichroism showing pink, purple, and clear or colorless depending on the viewing angle.
Hardness & Durability
Origin Region
Afghanistan, Madagascar, Brazil, and the United States (California)
Hardness & Durability
Mohs hardness of 6.5 to 7; high risk of cleavage makes it fragile and sensitive to sharp impacts; moderate wearability for jewelry with proper protective settings.
Care & Maintenance
Clean with warm soapy water using a soft brush; avoid ultrasonic cleaners, steam cleaners, harsh chemicals, and prolonged exposure to direct sunlight which can cause the pink color to fade.
Rarity & Value
Uncommon to Rare depending on color saturation and clarity; value is determined by intense pink-to-purple hue, size, and absence of prominent inclusions; often heat-treated or irradiated to enhance color depth.
Special Characteristics
Strong trichroism, perfect cleavage planes which complicate cutting, and susceptibility to fading (spontaneous loss of color under UV radiation or sunlight over time).
Lore & History
Discovered in 1902 and named after George Frederick Kunz, chief gemologist at Tiffany & Co. Traditionally associated with the heart chakra, emotional healing, unconditional love, and inner peace in metaphysical belief systems.