mineral

Lepidolite

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

AI-generated identification · may be incorrect

Hardness: 2.5-3.5 (Mohs scale), Color: Pink, lilac, or purple, Luster: Vitreous to pearly, Crystal structure: Monoclinic (micaceous), Cleavage: Perfect basal (one direction)

Hardness: 2

Identified July 12, 2026More mineral →

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Physical properties

Hardness: 2.5-3.5 (Mohs scale), Color: Pink, lilac, or purple, Luster: Vitreous to pearly, Crystal structure: Monoclinic (micaceous), Cleavage: Perfect basal (one direction)

Formation & geological history

Commonly formed in granite pegmatites and high-temperature hydrothermal veins. It is a secondary source of lithium and often associated with other lithium minerals like spodumene and tourmaline.

Uses & applications

A major source of lithium used in rechargeable batteries, glass, and ceramics. Also used as a decorative stone for carving, jewelry (cabochons), and for healing stone collections.

Geological facts

Lepidolite is known as the 'peace stone' due to its high lithium content, which is used in mood-stabilizing medications. It is one of the primary mica group minerals.

Field identification & locations

Identify by its characteristic purple/lilac color and soft, flaky micaceous structure. Commonly found in Brazil, Canada (Tanco Mine), Madagascar, and the USA (California, Maine). Collectors value bright color and large crystal scales.