mineral
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
Hardness 2.5-3 on Mohs scale; Pink to lilac or purplish-gray color; Vitreous to pearly luster; Monoclinic crystal system; Perfect basal cleavage producing thin micaceous flakes; Specific gravity ~2.8-2.9.
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Physical properties
Hardness 2.5-3 on Mohs scale; Pink to lilac or purplish-gray color; Vitreous to pearly luster; Monoclinic crystal system; Perfect basal cleavage producing thin micaceous flakes; Specific gravity ~2.8-2.9.
Formation & geological history
Forms primarily in lithium-rich granite pegmatites and high-temperature hydrothermal veins during late-stage magmatic crystallization.
Uses & applications
Major minor ore of lithium, used in energy storage and batteries, glass and ceramic manufacturing, and popular as a decorative specimen and gemstone for carving.
Geological facts
Lepidolite is the most common lithium-bearing mineral. Its name comes from the Greek word 'lepidos', meaning 'scale', in reference to its scaly micaceous appearance.
Field identification & locations
Identified by its distinctive lilac-pink color, micaceous scaly structure, soft hardness, and association with pegmatite minerals like quartz, albite, and tourmaline. Commonly found in Brazil, Madagascar, Russia, and the USA (California and Maine).
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