mineral

Lepidolite

K(Li,Al)3(Al,Si)4O10(F,OH)2 (Lithium-bearing phyllosilicate)

AI-generated identification · may be incorrect

Hardness: 2.5–3.0 on Mohs scale; Color: Pink, purplish-lavender, to lilac-gray; Luster: Vitreous to pearly; Crystal structure: Monoclinic (often occurring as micaceous masses); Cleavage: Perfect basal cleavage; Specific Gravity: 2.8–2.9.

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

Identified March 22, 2026More mineral →

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Physical properties

Formation & geological history

Lepidolite forms primarily in granitic pegmatites and high-temperature hydrothermal veins. It is a secondary mineral usually associated with other lithium minerals like spodumene or petalite. It forms in rare-element enrichment zones within late-stage igneous crystallization.

Uses & applications

A major source of the element lithium, used in rechargeable batteries, glass, and ceramics. In the gemstone industry, it is carved into decorative spheres, beads, and cabochons. It is also highly valued by collectors for its unique metallic/shimmery lavender appearance.

Geological facts

Lepidolite was originally named 'lilalite' because of its lavender color, but was later renamed from the Greek 'lepis' (scale) because of its scaly appearance. It is sometimes called the 'peace stone' in metaphysical circles due to its high lithium content, which is used in pharmaceutical mood stabilizers.

Field identification & locations

Identify in the field by its distinct lilac-to-pink color and micaceous (sheet-like) structure. When held to light, it often shows a 'sparkle' from flaky inclusions. Common locations include Brazil, Canada (Manitoba), Madagascar, and the USA (California and Maine).