Lepidolite
Lepidolite (var. of Mica) · Mineral Specimen / Semi-Precious Gemstone
Crystal System
Monoclinic; crystal habit is typically massive, scaly, or micaceous (tabular plates)
Mineral Group
Silicates; Phyllosilicate (Mica group)
Chemical Formula
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Formation Process
Igneous; primarily forms in late-stage granitic pegmatites through the concentration of lithium and volatiles during cooling
About This Crystal
A purple to lavender colored lilac mineral with a scaly or micaceous texture. It exhibits a vitreous to pearly luster and can vary from translucent to opaque with reflective flakes
Physical Characteristics
Color: Pink, purple, or lilac; Streak: White; Cleavage: Perfect basal (one direction); Fracture: Uneven; Specific Gravity: 2.8-2.9; Fluoresence: Sometimes creamy white or yellow under UV
Optical Properties
Biaxial negative; Refractive Index: 1.525-1.587; Birefringence: 0.018-0.038; Pleochroism: Weak to moderate in violet/pink tones
Hardness & Durability
Origin Region
Mainly Brazil (Minas Gerais), Madagascar, Canada, and Russia; typically found in lithium-bearing granitic pegmatites
Hardness & Durability
Mohs Hardness: 2.5 to 3 (very soft); Toughness: Poor due to easy cleavage; Low durability, easily scratched by a fingernail or penny
Care & Maintenance
Clean with a dry, soft cloth or warm soapy water only; avoid ultrasonic cleaners, harsh chemicals, and prolonged exposure to water which can separate the mica layers
Rarity & Value
Common; generally affordable as mineral specimens; value increases with intense purple color and presence of inclusions like pink tourmaline (rubellite)
Special Characteristics
High lithium content; often occurs in a 'scaly' aggregate known as 'micaceous' texture which creates a glittering, flaky surface effect
Lore & History
Discovered in the 18th century and named from the Greek 'lepidos' meaning scale. Historically significant as a secondary source of lithium. Metaphysically associated with the third eye and crown chakras, believed to promote emotional balance and stress relief.