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 deep violet purple; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific gravity: 2.8–2.9

Hardness: 2
Color: Pink, lilac, to deep violet purple
Luster: Vitreous to pearly

Identified May 17, 2026More mineral →

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Physical properties

Hardness: 2.5–3.5 on Mohs scale; Color: Pink, lilac, to deep violet purple; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific gravity: 2.8–2.9

Formation & geological history

Formed in late-stage crystallization of lithium-bearing pegmatites. It is often found associated with other lithium minerals like spodumene or tourmaline.

Uses & applications

Major source of lithium used in batteries and glass production; also used as an ornamental stone, for carving, and in jewelry (cabochons).

Geological facts

Lepidolite was originally named 'lilalite' because of its lavender color. It is a member of the mica group and is the most common lithium-bearing mineral.

Field identification & locations

Identify by its distinctive purple color and micaceous flake structure. Found commonly in Brazil, Canada (Tanco Mine), and Zimbabwe. Collectors look for high lithium content and vibrant color.