Iron Smelting Abydos Mining
Oct 27, 2020 Limonite, or iron ore swamp, 2Fe 2 O 3 3H 2 O is brown in color, and contains 59.8 of iron. Siderite FeCO 3 , is light brown in color, and contains 48.2 of iron. The History of Iron. Iron objects have been found in Egypt dating back to about 3500 BC, and they contained 7.5 of nickel, which indicates that they are of meteorite origin.