Lepidolite
Lepidolite (member of the Mica group, variety of Polylithionite-Trilithionite series) · Collector Mineral and Semi-Precious Gemstone
Crystal System
Monoclinic; commonly occurs in scaly, micaceous, or massive granular habits, rarely as distinct pseudohexagonal crystals.
Mineral Group
Silicates (Phyllosilicates / Mica Group)
Chemical Formula
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Formation Process
Igneous formation within granitic pegmatites during late-stage crystallization where lithium and fluorine are concentrated.
About This Crystal
A lithium-rich mica featuring a distinctive lilac, pink, or purple color. It has a vitreous to pearly luster and is usually translucent. It appears here as mass of tiny, sparkling scales (micaceous) embedded in a matrix.
Physical Characteristics
Color: Pink, lilac, violet, or gray; Streak: White; Cleavage: Perfect basal (one direction); Fracture: Uneven; Specific Gravity: 2.8–2.9; Tenacity: Brittle to elastic scaly flakes; Fluorescence: Occasionally pale yellow or cream under UV.
Optical Properties
Biaxial negative; Refractive Index: 1.525–1.587; Birefringence: 0.018–0.038; Pleochroism: Weak to moderate (pink/pale violet).
Hardness & Durability
Origin Region
Brazil (Minas Gerais), USA (California, Maine), Madagascar, and Zimbabwe; found in lithium-bearing granitic pegmatites.
Hardness & Durability
Mohs hardness: 2.5–3.5 (very soft); Toughness: Low (easily flakes); Cleavage makes it fragile; generally not suitable for rings, better as beads or specimens.
Care & Maintenance
Clean with a soft, dry cloth or lukewarm soapy water; avoid ultrasonic or steam cleaners. Store away from harder stones to prevent scratching and avoid prolonged exposure to intense heat.
Rarity & Value
Relatively common in pegmatites; value is determined by color intensity and the presence of other minerals (like pink tourmaline). Usually affordable as mineral specimens.
Special Characteristics
Pearly luster on cleavage faces and 'glitter' effect due to light reflecting off numerous tiny mica flakes; also a secondary ore of lithium and rubidium.
Lore & History
Historically recognized as a source of lithium. In metaphysical traditions, it is known as a 'stone of transition' and 'peace stone,' associated with the Third Eye and Heart chakras for emotional balance.