Iron oxide, wanda kuma aka sani da ferric oxide, burned limonite, burned ocher, iron ja, iron ja, iron ja, ja foda, Venetian ja (babban bangaren shine iron oxide), da sauransu. Tsarin sinadaran Fe2O3, wanda ke narkewa a cikin hydrochloric acid, foda ne mai launin ja-kasa-kasa. Fodarsa mai launin ja-kasa-kasa launinta ne mai ƙarancin daraja, wanda ake kira iron oxide ja a masana'antu. Ana amfani da shi a fenti, tawada, roba da sauran masana'antu a matsayin mai kara kuzari, wakili mai goge gilashi, dutse mai daraja da ƙarfe, kuma ana iya amfani da shi azaman kayan aiki don yin ƙarfe.