mineral

Lepidolite

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

Hardness: 2.5–3 on Mohs scale; Color: Pink, lilac, purplish-gray; Luster: Vitreous to pearly; Crystal structure: Monoclinic (micaceous); Cleavage: Perfect basal (peels in thin sheets); Specific Gravity: 2.8–2.9.

Hardness: 2
Color: Pink, lilac, purplish-gray
Luster: Vitreous to pearly

Identified April 4, 2026More mineral →

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Physical properties

Formation & geological history

Lepidolite is a lithium-rich mica formed in granitic pegmatites during the late stages of magmatic crystallization. It is often found associated with other lithium minerals like tourmaline and spodumene.

Uses & applications

A major source of lithium used in rechargeable batteries, glass making, and ceramics. Also used as an ornamental stone, in jewelry (cabochons), and highly valued by mineral collectors for its unique color.

Geological facts

Lepidolite was originally named 'lilalite' because of its lavender color, but was later renamed from the Greek word 'lepidos' (scale) due to its scaly appearance. It often contains traces of rare elements like rubidium and cesium.

Field identification & locations

Identify by its characteristic lilac to pink color and its micaceous habit (tendency to flake into thin, flexible scales). Found commonly in Brazil, Africa (Zimbabwe), and the United States (California/Maine).

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