mineral

Lepidolite on Matrix

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

AI-generated identification · may be incorrect

Hardness: 2.5-3.5 on Mohs scale; Color: Pink, lilac, or purple-grey; Luster: Vitreous to pearly; Crystal structure: Monoclinic (micaceous); Cleavage: Perfect basal; Specific gravity: 2.8-2.9.

Hardness: 2
Color: Pink, lilac, or purple-grey
Luster: Vitreous to pearly

Identified March 26, 2026More mineral →

Explore Lepidolite on Matrix in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 2.5-3.5 on Mohs scale; Color: Pink, lilac, or purple-grey; Luster: Vitreous to pearly; Crystal structure: Monoclinic (micaceous); Cleavage: Perfect basal; Specific gravity: 2.8-2.9.

Formation & geological history

Formed in granitic pegmatites through late-stage hydrothermal processes. It is often found in lithium-rich environments and can vary in age from millions to over a billion years depending on the specific deposit.

Uses & applications

A primary ore of Lithium used in batteries and glass production; also used in jewelry (cabochons), carvings, and highly valued by metaphysical collectors.

Geological facts

Lepidolite is one of the major sources of the rare alkali metals rubidium and cesium. It is often associated with other lithium minerals like spodumene and tourmaline.

Field identification & locations

Identify by its distinctive lilac/purple color and micaceous 'flakey' or 'scaly' appearance. Commonly found in Brazil, Canada, Madagascar, and the USA (California/Maine). Collectors look for vibrant color and crystal clarity.