mineral

Lepidolite

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

Hardness: 2.5–3.5 on Mohs scale; Color: Lilac, lavender, pink, or purplish-gray; Luster: Pearly to vitreous; Crystal Structure: Monoclinic (typically scaly or fine-grained micaceous aggregates); Cleavage: Perfect basal cleavage in macroscopic flakes; Specific Gravity: 2.8–2.9

Hardness: 2
Color: Lilac, lavender, pink, or purplish-gray
Luster: Pearly to vitreous

Identified July 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed primarily in lithium-bearing granite pegmatites during the late stages of magmatic crystallization, often associated with tourmaline, albite, quartz, and spodumene.

Uses & applications

Major ore of lithium used in batteries, glass, and ceramics manufacture. Highly popular as a decorative carving, polished egg, sphere, and ornamental gemstone due to its soft lavender hue.

Geological facts

Lepidolite is one of the primary natural sources of lithium. Its name comes from the Greek word 'lepidos', meaning 'scale', in reference to its characteristic scaly, micaceous structure.

Field identification & locations

Identified by its distinctive pale lilac to purplish-pink color and fine scaly texture. Commonly mined in Brazil, Madagascar, Russia, Afghanistan, and the United States (California, Maine).