mineral

Lepidolite

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

Hardness: 2.5–3.5 on Mohs scale; Color: Pink, lilac, to purplish-gray; Luster: Vitreous to pearly; Crystal structure: Monoclinic (often found in massive or micaceous aggregates); Cleavage: Perfect basal (peels into thin sheets); Specific Gravity: 2.8–2.9

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

Identified March 29, 2026More mineral →

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Physical properties

Formation & geological history

Formed primarily in lithium-bearing granitic pegmatites. It is often a secondary mineral formed during the late stages of magmatic crystallization, frequently associated with quartz, feldspar, and tourmaline.

Uses & applications

Primary source of lithium used in rechargeable batteries, glass, and ceramics. Also used as an ornamental stone, for lapidary work (cabochons), and highly valued in the metaphysical/collecting community.

Geological facts

Lepidolite is the most common lithium-bearing mineral. Its name is derived from the Greek word 'lepidos' for scale, referring to its scaly, micaceous appearance. It is unique among micas for its high rubidium content.

Field identification & locations

Identify by its distinctive lilac-purple color and micaceous flake-like texture that can be scratched with a penny. Commonly found in Brazil, Canada (Manitoba), Madagascar, and the United States (California and Maine).

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Mineral/Rock

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