Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Monoclinic; commonly occurs in massive, scaly, or micaceous aggregates
Mineral Group
Silicates; Phyllosilicate (Mica group)
Chemical Formula
K(Li,Al)3(Al,Si)4O10(F,OH)2 / often contains trace Cesium (Cs) and Rubidium (Rb)
Formation Process
Igneous formation; primarily found in lithium-bearing granite pegmatites
About This Crystal
A violet to lilac-gray mica mineral. It typically exhibits a pearly to vitreous luster and a 'glittery' appearance due to its micaceous structure. It is translucent to opaque and often features small, reflective flakes.
Physical Characteristics
Color: Pink, purple, or lilac; Streak: White; Cleavage: Perfect basal (micaceous); Fracture: Uneven; Specific Gravity: 2.8–2.9; Fluorescence: Occasionally cream or pale yellow under UV.
Optical Properties
Refractive Index: 1.525–1.587; Birefringence: 0.029–0.038; Pleochroism: Colorless to pink/violet; Biaxial negative.
Hardness & Durability
Origin Region
Brazil (Minas Gerais), Madagascar, USA (California, Maine), and Zimbabwe
Hardness & Durability
Mohs Hardness: 2.5–3.5; Poor durability due to low hardness and perfect cleavage; susceptible to scratching.
Care & Maintenance
Clean with a soft, dry cloth or lukewarm soapy water. Avoid ultrasonic cleaners, steam, and harsh chemicals. Store separately from harder stones to prevent surface damage.
Rarity & Value
Relatively common; value is determined by the intensity of the purple color and the size of the specimen. Generally affordable.
Special Characteristics
High lithium content (primary source of industrial lithium). Often found intergrown with pink Tourmaline (Rubellite) or Cleavelandite.
Lore & History
Historically recognized as a source of lithium for mood stabilization. In metaphysical lore, it is known as the 'Stone of Transition' or 'Peace Stone,' associated with the Third Eye and Crown Chakras.