Bible Dictionaries
Phlogopite

Webster's Dictionary

(n.) 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.

Bibliography Information
Webster, Noah. Entry for 'Phlogopite'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/phlogopite.html. 1828.