article: Iron
links: Iron(III) oxide Iron compounds Earth Stainless steel Steel Chemical element Indiana Great Oxygenation Event Earth's core Malleability Iron(II) chloride United States Iron(II,III) oxide Michigan Iron(III) sulfate Minnesota Iron(II) oxide Iron(II) sulfide Iron(III) chloride Wrought iron Allotropes of iron Iron(II) hydroxide Iron Age Magnet Carbon steel United States Department of Agriculture Iron(II) sulfate Mild steel Iron(III) nitrate Smelting Earth's crust