Lepidolite
Lepidolite (Potassium Lithium Aluminum Silicate) · Semi-Precious Gemstone / Collector Mineral
Crystal System
Monoclinic; typically occurs in scaly, granular, or micaceous massive aggregates.
Mineral Group
Silicates (Phyllosilicates; Mica group)
Chemical Formula
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Formation Process
Igneous; primarily forms in lithium-bearing granitic pegmatites during the late stages of crystallization.
About This Crystal
A lavender to rose-pink micaceous mineral with a vitreous to pearly luster. This specimen shows a characteristic granular, scaly texture with sparkling reflections from small mica flakes.
Physical Characteristics
Color: Pink, lavender, or purple; Streak: White; Cleavage: Perfect basal (one direction); Fracture: Uneven; Specific Gravity: 2.8–2.9; Fluorescence: Occasionally cream or yellow under UV light.
Optical Properties
Refractive Index: 1.525–1.587; Biaxial negative; weak pleochroism in pinkish tones; pearly luster on cleavage faces.
Hardness & Durability
Origin Region
Brazil (Minas Gerais), USA (California, Maine), Madagascar, and Zimbabwe.
Hardness & Durability
Mohs Hardness: 2.5–3.5. Very low durability; soft and easily scratched. Brittle tenacity.
Care & Maintenance
Avoid ultrasonic cleaners and steam. Clean with a soft, dry cloth or lukewarm soapy water. Sensitive to heat and chemicals. Store separately from harder gemstones.
Rarity & Value
Relatively common in lithium-rich pegmatites. Value is generally low to moderate, determined by color intensity and lithium content. Often mass-produced for carvings and tumbled stones.
Special Characteristics
Sparkling micaceous inclusions; high lithium content provides the characteristic purple/pink hue; often found associated with Pink Tourmaline (Rubellite) or Quartz.
Lore & History
Discovered in the 18th century and originally named 'lilalite'. Historically used as a source of lithium. In metaphysical lore, it is known as the 'stone of transition' and associated with the Crown Chakra for calming anxiety.