Lepidolite
Lepidolite (Lithium Mica) · Mineral Specimen and Semi-Precious Stone / Decorative Stone
Crystal System
Monoclinic; typically found in massive, scaly, or granular aggregates, occasionally as pseudohexagonal tabular crystals.
Mineral Group
Silicates; specifically phyllosilicates (mica group).
Chemical Formula
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Formation Process
Hydrothermal and pneumatolytic processes in granitic pegmatites, forming under late-stage crystallization from volatile-rich magma.
About This Crystal
This is a tumbled specimen of lepidolite displaying a characteristic lilac-pink to purple coloration with mottled white quartz and reddish-orange iron oxide inclusions. It has a translucent to opaque appearance with a sub-vitreous to pearly luster typical of tumbled micas.
Physical Characteristics
Color ranges from lilac, pink, and purple to greyish-white. Streak is white. Perfect basal cleavage in one direction yielding flexible thin flakes. Fracture is uneven. Specific gravity is approximately 2.8 to 2.9. Tenacity is sectile and flexible in thin sheets.
Optical Properties
Biaxial (-) with refractive indices around nα = 1.530 - 1.545, nβ = 1.560 - 1.585, nγ = 1.565 - 1.590. Shows faint pleochroism in shades of pink and colorless.
Hardness & Durability
Origin Region
Notable sources include Brazil, Madagascar, the United States (California), Russia, and Canada. Typically found in lithium-rich granitic pegmatites.
Hardness & Durability
Mohs hardness is 2.5 to 4. Low durability due to perfect basal cleavage and softness; easily scratched and not recommended for everyday rings without protective settings.
Care & Maintenance
Clean with a soft damp cloth and mild soap; avoid ultrasonic cleaners, harsh chemicals, prolonged exposure to direct sunlight, and excess moisture due to the soft mica structure.
Rarity & Value
Common to uncommon as a mineral specimen and decorative stone. Value is generally low to moderate, driven primarily by size, color saturation, and aesthetic appeal of the associated matrix.
Special Characteristics
Contains significant amounts of lithium, making it a primary ore mineral for lithium extraction. Exhibits characteristic micaceous cleavage and soothing lilac hues due to trace rubidium and manganese.
Lore & History
Often referred to as the 'peace stone' or 'transition stone' in crystal healing communities, traditionally believed to help reduce stress, anxiety, and emotional turbulence by promoting calm and serenity. Associated with the Crown and Heart chakras.