Phlogopite \Phlog"o*pite\, n. [Gr. ? firelike.] (Min.) 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}.
phlogopite n : a brown form of mica consisting of hydrous silicate of potassium and magnesium and aluminum