Lepidolite
Lepidolite (Mica Group) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Monoclinic; commonly occurs in massive, scaly, or micaceous aggregates.
Mineral Group
Silicates; Phyllosilicate (Mica) subgroup
Chemical Formula
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Formation Process
Igneous formation; primarily occurs in granitic pegmatites through the crystallization of lithium-rich residual magmas.
About This Crystal
This specimen displays a fine-grained, scaly (micaceous) texture with a characteristically pearly to vitreous luster. The color ranges from lilac and pink to purplish-gray, occurring in a massive form where individual small flakes reflect light.
Physical Characteristics
Color: Pink to purple; Streak: White; Cleavage: Perfect basal (one direction); Fracture: Uneven; Specific Gravity: 2.8–2.9; Fluorescence: Occasionally creamy white or yellow under UV.
Optical Properties
Refractive Index: 1.525–1.587; Birefringence: 0.018–0.038; Biaxial negative; exhibits weak pleochroism in thicker sections.
Hardness & Durability
Origin Region
Brazil, Madagascar, USA (California/Maine), and Zimbabwe; typically found in granitic pegmatites.
Hardness & Durability
Mohs Hardness: 2.5–3.5; brittle toughness; low durability for jewelry due to extreme softness and perfect cleavage.
Care & Maintenance
Clean with warm soapy water only; avoid ultrasonic or steam cleaners. Store away from harder stones to prevent scratching and avoid prolonged exposure to intense sunlight.
Rarity & Value
Common to Uncommon; value is driven by color intensity (deep purples) and lithium content for industrial use. Generally affordable as a specimen.
Special Characteristics
Known for its high lithium content; often contains trace amounts of rubidium. Displays characteristic 'mica' sparkle when light reflects off cleavages.
Lore & History
Historically used as a source of lithium. In metaphysical lore, it is known as the 'Stone of Transition' and is traditionally associated with emotional balance and the Third Eye/Crown chakras.