Not an element or metal, but an ore
1017-1300 °F, 550 -700°C
What is Fool's Gold?
Iron pyrite or Fool's Gold is a brassy yellow mineral that is often mistaken for gold, but there are many ways to tell the difference. Although pyrite is common and contains a high percentage of iron, it has never been used as a significant source of iron.
Pyrite was popular in Roman times as a source for sparks when struck with steel. Later in 1500 - 1600 AD this ability was used as a source for ignition in most firearms. It was also used as an early source for oil of vitriol (sulfuric acid).