hematite magnetite limonite and siderite
highest iron hematite or magnetite or siderite . Iron Ore Mining Artifacts. The iron itself is usually found in the form of magnetite (Fe3O4), hematite (Fe2O3), goethite, limonite or siderite. ... hematite magnetite limonite and siderite. important iron ores magnetite,siderite,iron pyrite and hematite. The iron ores of chief highest iron ...