rauamaagid - looduslikud rauatoorained, maavarad. Tähtsamaid rauamaake moodustavad mineraalid on magnetiit, titanomagnetiit, hematiit, götiit ja sideriit; rauamaagi aheraine sisaldab kvartsi, silikaate ja alumosilikaate, karbonaate, savimineraale jpm.
ferruginous rock containing one or more distinct natural chemical compounds from which metallic iron may be profitably extracted. The chief ores of iron consist mainly of the oxides: hematite ...; goethite ...; magnetite ...; and the carbonate, siderite or chalybite....
