mineral

Lepidolite

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

Hardness: 2.5–3 on Mohs scale; Color: Pink, lilac, or purple; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal cleavage; Specific Gravity: 2.8–2.9

Hardness: 2
Color: Pink, lilac, or purple
Luster: Pearly to vitreous

Identified March 23, 2026More mineral →

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Physical properties

Hardness: 2.5–3 on Mohs scale; Color: Pink, lilac, or purple; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal cleavage; Specific Gravity: 2.8–2.9

Formation & geological history

Formed in lithium-bearing granitic pegmatites and occasionally in high-temperature hydrothermal veins. Associated with minerals like tourmaline and spodumene. Typically Precambrian to Mesozoic in age.

Uses & applications

Primarily used as a major source of Lithium, which is essential for rechargeable batteries. Used in jewelry (beads, cabochons), ornamental carvings, and as a popular specimen for crystal collectors.

Geological facts

Known as the 'Peace Stone,' it is famous for containing high amounts of lithium, which is often used in anti-anxiety medications. It was originally named 'lilalite' by Robert Bunsen and Gustav Kirchhoff.

Field identification & locations

Identify in the field by its distinct purple/lavender color, micaceous (flaky) texture, and low hardness. Commonly found in Brazil, Russia (Ural Mountains), USA (California, Maine), and Madagascar.

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