Noun
A kind of mica having generally a peculiar bronze-red or copperlike color and a pearly luster. It is a silicate of aluminia, with magnesia, potash, and some fluorine. It is characteristic of crystalline limestone or dolomite and serpentine. See Mica.
Source: Webster's dictionaryBuilt-up mica Muscovite and phlogopite splittings can be fabricated into various built-up mica products. Source: Internet
The commercially important micas are muscovite and phlogopite, which are used in a variety of applications. Source: Internet