mineral
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
AI-generated identification · may be incorrectHardness of 2.5 to 4 on the Mohs scale, pink to lilac-gray color, pearly to vitreous luster, monoclinic crystal system, and perfect basal cleavage.
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Physical properties
Hardness of 2.5 to 4 on the Mohs scale, pink to lilac-gray color, pearly to vitreous luster, monoclinic crystal system, and perfect basal cleavage.
Formation & geological history
Forms in lithium-rich granitic pegmatites and high-temperature hydrothermal veins, often associated with tourmaline and quartz.
Uses & applications
Primary ore of lithium, used in glass and ceramic manufacturing, and popular as a collector mineral or polished gemstone.
Geological facts
Lepidolite is known as the 'scale stone' due to its scaly, micaceous appearance and is one of the few principal sources of the rare alkali metal lithium.
Field identification & locations
Identified by its distinctive lilac-pink color, micaceous habit, and flaky texture; commonly found in Brazil, Madagascar, and the USA.
