mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb,Cs)4O10(F,OH)2
AI-generated identification · may be incorrectLepidolite has a Mohs hardness of 2.5 to 4, exhibits a pearly to vitreous luster, and typically displays pink, purple, or lilac colors. It has a monoclinic crystal system and perfect basal cleavage, often forming flaky, micaceous aggregates.
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Physical properties
Lepidolite has a Mohs hardness of 2.5 to 4, exhibits a pearly to vitreous luster, and typically displays pink, purple, or lilac colors. It has a monoclinic crystal system and perfect basal cleavage, often forming flaky, micaceous aggregates.
Formation & geological history
It forms in lithium-rich granitic pegmatites and high-temperature quartz veins through pneumatolytic processes during the final stages of magma crystallization.
Uses & applications
Lepidolite is a major ore mineral for the extraction of the alkali metal lithium and is widely used in making glass, ceramics, and gemstone carvings.
Geological facts
Because of its high lithium and potassium content, it is often associated with other rare pegmatite minerals like tourmaline and spodumene. It was originally named lilalite due to its characteristic lavender color before being renamed.
Field identification & locations
Identify it by its distinct lilac-pink color, micaceous flaky habit, and perfect cleavage sheets. Common localities include Brazil, Madagascar, the United States, and the Czech Republic.
