![Iron and steel](/3wzg0da/574.jpg)
Iron and steel
· Magnetite (black ore; the magnetic type of iron oxide, also called lodestone) Pyrite Siderite Taconite (a combination of hematite and magnetite). Different ores contain different amounts of iron. Hematite and magnetite have about 70 percent iron, limonite has about 60 percent, pyrite and siderite have 50 percent, while taconite has only 30 percent.