mineral

Lepidolite

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

Hardness: 2.5-3.5 on Mohs scale; Color: Pink, lilac, or purple-grey; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific Gravity: 2.8-2.9

Hardness: 2
Color: Pink, lilac, or purple-grey
Luster: Vitreous to pearly

Identified July 17, 2026More mineral →

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Physical properties

Hardness: 2.5-3.5 on Mohs scale; Color: Pink, lilac, or purple-grey; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific Gravity: 2.8-2.9

Formation & geological history

Formed in granitic pegmatites during the final stages of magmatic crystallization, often associated with other lithium-bearing minerals like tourmaline or spodumene.

Uses & applications

Primary source of lithium used in batteries and glass making; highly valued by collectors and used as ornamental stone or for metaphysical purposes.

Geological facts

Lepidolite is the most common lithium-bearing mineral and was first discovered in the eighteenth century. It was originally named 'lilalite' because of its lavender color.

Field identification & locations

Identifiable by its distinct purple/pink color and flaky, micaceous habit. It can often be peeled into thin sheets. Commonly found in Brazil, Canada, Madagascar, and the USA (Maine, California).