What compounds also known as ferric oxide is used in ceramic colorants?
Ceramic colorants: Ceramic colorants are added to a glaze or a clay to create color. Ceramic colorants:  Carbonates and oxides of certain metals, characterize most colorants including the commonly used cobalt carbonate, cobalt oxide, chrome oxide, red iron oxide, and copper carbonate. Iron(III) oxide: Iron(III) oxide or ferric oxide is the inorganic compound with the formula FeO.
iron oxide