hematite magnetite limonite and siderite - aatma. magnetite hematite limonite siderite which metal Iron Ore | Definition of Iron Ore by Merriam-Webster. a native compound of iron (as hematite, limonite, magnetite, siderite, goethite, and the bog and clay . what are hematite magnetite and siderite Bladed crystals of what were once hematite now replaced by magnetite and coated …