mineral

Lepidolite

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

AI-generated identification · may be incorrect

Hardness: 2.5-3.5 on Mohs scale. Color: lilac, purple, rose-pink. Luster: vitreous to pearly. Crystal structure: Monoclinic. Perfect basal cleavage. Specific gravity: 2.8–2.9.

Hardness: 2
Color: lilac, purple, rose-pink
Luster: vitreous to pearly

Identified July 14, 2026More mineral →

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Physical properties

Hardness: 2.5-3.5 on Mohs scale. Color: lilac, purple, rose-pink. Luster: vitreous to pearly. Crystal structure: Monoclinic. Perfect basal cleavage. Specific gravity: 2.8–2.9.

Formation & geological history

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

Uses & applications

Major source of lithium used in batteries and glass production. Also used as an ornamental stone, for carving, and in jewelry as cabochons or tumbled stones.

Geological facts

Lepidolite is known as a 'stone of transition' in metaphysical circles. It contains the highest levels of rubidium of any mineral and was first discovered in the 18th century.

Field identification & locations

Can be identified in the field by its distinct lilac color and micaceous (flakey) structure. It is soft enough to be scratched by a copper coin. Found often in Brazil, Madagascar, and the USA (California/Maine).