Biotite

Definition:

• (n.) Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica.

Compare biotite with other words:

biotite vs. diorite

biotite vs. phlogopite

biotite vs. muscovite

biotite vs. iron

biotite vs. magnesium

biotite vs. potassium

biotite vs. fluoride

biotite vs. pegmatite

biotite vs. mica