Lepidolite is a relatively rare species of mica, of a lilac or rose-violet colour, found in pegmatic dikes and usually associated with lithium bearing minerals such as pink and green tourmaline. Often found intergrown with muscovite. Used as a source of lithium and it’s used in the manufacture of heat resistant glass. It has the formulae K(Li,Al)3(Si,Al)4O10(F,OH)2 and a relative hardness of 4.
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