mineral

Lepidolite

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

Mohs hardness of 2.5 to 4; color ranges from pink, purple, to lilac-gray; pearly to vitreous luster; monoclinic crystal system; perfect basal cleavage; specific gravity of 2.8 to 2.9.

Identified August 4, 2026More mineral →

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Physical properties

Mohs hardness of 2.5 to 4; color ranges from pink, purple, to lilac-gray; pearly to vitreous luster; monoclinic crystal system; perfect basal cleavage; specific gravity of 2.8 to 2.9.

Formation & geological history

Forms in granite pegmatites, high-temperature quartz veins, and greisens. It is a secondary source of lithium and is typically associated with other lithium-bearing minerals like spodumene and tourmaline.

Uses & applications

Primary ore of lithium metal, used in specialty glass and ceramics manufacturing, and popular as a decorative specimen or in crystal healing collections.

Geological facts

Lepidolite's distinctive lilac color comes from trace amounts of lithium and sometimes manganese. Because of its high mica content, it can be slightly flexible and greasy to the touch.

Field identification & locations

Easily identifiable in the field by its characteristic lilac-pink or purple color and flaky, micaceous habit. Commonly found in pegmatite deposits worldwide, including Brazil, Madagascar, the United States (California), and Russia.