mineral

Lepidolite

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

Hardness: 2.5-3 (Mohs scale), Color: Pink, lavender, or purple. Luster: Vitreous to pearly. Crystal structure: Monoclinic (often found in micaceous masses). Cleavage: Perfect basal cleavage. Specific Gravity: 2.8-2.9.

Hardness: 2
Color: Pink, lavender, or purple
Luster: Vitreous to pearly

Identified June 22, 2026More mineral →

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Physical properties

Formation & geological history

Lepidolite is a lithium-rich phyllosilicate mineral of the mica group. It forms primarily in granitic pegmatites and is often associated with other lithium minerals like tourmaline and spodumene. It forms through late-stage magmatic crystallization.

Uses & applications

Lepidolite is a major source of lithium, which is used in rechargeable batteries, glass, and ceramics. It is also used in jewelry (as beads or cabochons), carved into decorative items, and is popular in the metaphysical/crystal collecting community.

Geological facts

Lepidolite was originally named Lilalite because of its lilac color, but was later renamed from the Greek word 'lepidos' meaning scale, referring to its scaly appearance. It often contains significant traces of rubidium and cesium.

Field identification & locations

Identify in the field by its distinct lilac-to-purple color, micaceous 'pearly' glitter, and extreme softness (can be scratched by a fingernail). It is commonly found in Brazil, Russia, Canada (Quebec), and the USA (California and Maine).