Lepidolite
Lepidolite (Mica Group) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Monoclinic; commonly occurs in massive, scaly, or granular aggregates (micaceous habit).
Mineral Group
Silicates; Phyllosilicate (Mica group)
Chemical Formula
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Formation Process
Igneous formation within highly evolved granite pegmatites during the late stages of magmatic crystallization where lithium is concentrated.
About This Crystal
This specimen is a polished sphere approximately 20mm in diameter. It exhibits a dusky lavender to purplish-pink hue with a mottled, granular texture characteristic of massive lepidolite. It is opaque with a vitreous to pearly luster and shows a small white patch of matrix or associated mineral (possibly quartz or feldspar).
Physical Characteristics
Color: Lavender, pink, or purple; Streak: White; Cleavage: Perfect basal (though not visible in spherical form); 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: 0.021–0.038; Doubly refractive; non-pleochroic in massive form; pearly sheen due to mica flakes.
Hardness & Durability
Origin Region
Brazil, Madagascar, Canada, and USA (California/Maine); typically found in lithium-bearing granite pegmatites.
Hardness & Durability
Mohs Hardness: 2.5–3.5. Very soft and brittle; prone to scratching and flaking. Not recommended for rings; best suited for display or low-impact pendents.
Care & Maintenance
Avoid ultrasonic cleaners and steam. Clean only with warm soapy water and a soft cloth. Store separately from harder gemstones like quartz to avoid scratches. Highly sensitive to pressure.
Rarity & Value
Relatively common and affordable. Value is determined by color intensity (deeper purples are preferred) and the presence of 'pink tourmaline' inclusions. Usually untreated.
Special Characteristics
Known for its high lithium content. The granular 'sparkling' appearance is caused by the alignment of tiny mica flakes reflecting light.
Lore & History
Historically recognized as a primary source of lithium. In metaphysical traditions, it is known as the 'Stone of Transition' or 'Peace Stone,' associated with the Heart and Third Eye chakras, and believed to help reduce stress and anxiety due to its lithium content.