Lepidolite
Mica var. Lepidolite (Lithium-rich Phyllosilicate) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Monoclinic; commonly occurs in massive, scaly, or granular aggregates (the image shows a tumbled/granular habit)
Mineral Group
Silicates; Phyllosilicates (Mica Group)
Chemical Formula
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Formation Process
Igneous formation; specifically crystallized in late-stage granite pegmatites from lithium-rich fluids
About This Crystal
The specimen is a tumbled, lilac-to-pinkish-lavender stone. It displays a characteristic granular/micaceous texture with a vitreous to pearly luster. It is opaque to translucent on the edges, showing a mottled or 'scaly' internal structure typical of lithium micas.
Physical Characteristics
Color: Pink, lilac, or purple; Streak: White; Cleavage: Perfect basal (though obscured in tumbled form); Specific Gravity: 2.8–2.9; Fluorescence: Occasionally cream or pale yellow under UV; Magnetism: None.
Optical Properties
Refractive Index: 1.525–1.587; Birefringence: 0.018–0.038; Diaphaneity: Opaque in mass, translucent in thin sections; No notable phenomena like asterism.
Hardness & Durability
Origin Region
Brazil, Madagascar, USA (California/Maine), Afghanistan, and Zimbabwe; typically found in lithium-bearing granite pegmatites
Hardness & Durability
Mohs Hardness: 2.5–3.5. It is very soft and sectile; low toughness makes it prone to scratching and crumbling. Not recommended for rings.
Care & Maintenance
Clean only with warm soapy water and a soft cloth; avoid ultrasonic or steam cleaners. Store separately from harder stones like quartz to prevent scratching. Keep away from harsh household chemicals.
Rarity & Value
Relatively common; value is determined by the intensity of the purple color and size. Generally inexpensive. Natural specimens are rarely treated, though some may be stabilized with resins.
Special Characteristics
High lithium content; distinct micaceous 'glitter' or sparkles from tiny internal cleavage planes; often found in association with pink tourmaline (rubellite).
Lore & History
Historically recognized as a primary source of lithium (discovered in 1792). In metaphysical traditions, it is known as the 'Stone of Transition' or 'Peace Stone,' associated with the Crown and Third Eye chakras and believed to reduce stress due to its lithium content.