mineral

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

AI-generated identification · may be incorrect

Hardness: 2.5-3.5 on Mohs scale; Color: Pink, lilac, rose-red to violet-gray; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal cleavage; Specific gravity: 2.8-2.9

Hardness: 2
Color: Pink, lilac, rose-red to violet-gray
Luster: Vitreous to pearly

Identified June 13, 2026More mineral →

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Physical properties

Hardness: 2.5-3.5 on Mohs scale; Color: Pink, lilac, rose-red to violet-gray; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal cleavage; Specific gravity: 2.8-2.9

Formation & geological history

Formed in granitic pegmatites containing lithium. It is often associated with other lithium minerals like spodumene and tourmaline. It occurs in late-stage crystallization of highly fractionated magma.

Uses & applications

Primary source of lithium used in batteries, glass, and ceramics. It is also used as a gemstone, for ornamental carvings, and by mineral collectors for its unique color.

Geological facts

Lepidolite was first discovered in the 18th century and is named after the Greek word 'lepidos', meaning scale, referring to its scaly or micaceous texture. It contains high amounts of the rare alkali metals rubidium and cesium.

Field identification & locations

Identify by its distinctive lilac/pink color and micaceous (flakey) habit. Commonly found in Brazil, Russia (Ural Mountains), USA (California, Maine), and Zimbabwe. Collectors should look for its pearly sheen and ease of scratching with a copper penny.