Lepidolite
Lepidolite (Mica Group) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Monoclinic; commonly occurs in massive, scaly, or micaceous aggregates.
Mineral Group
Silicates (Phyllosilicates); Mica Group (Lithium-rich Mica)
Chemical Formula
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Formation Process
Igneous formation; primarily occurs in granite pegmatites and occasionally in high-temperature hydrothermal veins through late-stage magmatic crystallization.
About This Crystal
The specimen is a tumbled, lilac-to-rose-purple stone with a characteristic pearly to vitreous luster. It is translucent to opaque with a crystalline, 'scaly' texture visible under the polished surface. Small glimmering flakes are present due to its micaceous structure.
Physical Characteristics
Color: Pink, lilac, or purple; Streak: White; Cleavage: Perfect basal (though not visible in tumbled form); Fracture: Uneven; Specific Gravity: 2.8–2.9; Fluorescence: Sometimes creamy white or yellow under UV.
Optical Properties
Refractive Index: 1.525–1.587; Birefringence: 0.029–0.050; Pleochroism: Weak; Optical Phenomenon: Shimmering effect (aventurescence-like) from internal mica flakes.
Hardness & Durability
Origin Region
Brazil (Minas Gerais), Madagascar, Canada, USA (California/Maine), and Zimbabwe. Found largely in lithium-bearing pegmatites.
Hardness & Durability
Mohs Hardness: 2.5–3.5. Very soft and brittle; prone to scratching and splitting along cleavage planes. Low wearability for jewelry except in protected settings.
Care & Maintenance
Clean only with warm soapy water and a soft cloth; avoid ultrasonic cleaners and steam. Keep away from harder stones to prevent scratches. Sensitive to heat and acidic chemicals.
Rarity & Value
Common to Uncommon. Value is generally low, determined by color intensity and shimmer. Large tumbled pieces are affordable. Often used as an ore of Lithium.
Special Characteristics
High lithium content gives it its signature purple color. Exhibits a 'scaly' appearance (the name derives from the Greek 'lepidos' for scale).
Lore & History
Historically recognized as a source of lithium used in the 19th century. In metaphysical traditions, it is known as the 'Stone of Transition' or 'Peace Stone' associated with the Third Eye and Crown Chakras, believed to assist in stress reduction due to its lithium content.