1、Iron oxide pigment is a color pigment whose basic substance is the oxide of iron, such as red oxide, yellow iron oxide, black iron oxide, and brown oxide.
2、Any of a group of widely occurring yellowish - brown to black iron oxide minerals, essentially FeO(OH)?H2O, used as a minor ore of iron.
3、The mineral form of black iron oxide, Fe3O4, that often occurs with magnesium, zinc, and manganese and is an important ore of iron.
