mineral

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 (micaceous); Cleavage: Perfect basal (peels in flakes); Specific gravity: 2.8-2.9

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

Identified July 2, 2026More mineral →

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Physical properties

Formation & geological history

Formed in rare-metal granite pegmatites. It is one of the major sources of the rare element lithium and often occurs with other lithium minerals like spodumene and tourmaline.

Uses & applications

Major ore of lithium used in rechargeable batteries, glass, and ceramics. Also used as a decorative stone, in jewelry (as cabochons), and highly valued by collectors for its unique color.

Geological facts

Lepidolite is known as the 'peace stone' in metaphysical circles due to its high lithium content, which is used in mood-stabilizing medications. It was originally named 'lilalite' because of its lavender color.

Field identification & locations

Identify by its distinct lilac-to-pink color and micaceous structure (shiny flakes). In the field, it is often found in coarse-grained igneous rocks like pegmatites in Brazil, Canada (Manitoba), Madagascar, and the US (California/Maine).