The lack of oxidation of this and uranium minerals from Elliot Lake, Canada has been used as evidence
 of low oxygen levels during the Paleoproterozoic era. Bravoite is a nickel version of this mineral. In anoxic
 sediments, it is believed that this 
The lack of oxidation of this and uranium minerals from Elliot Lake, Canada has been used as evidence
 of low oxygen levels during the Paleoproterozoic era. Bravoite is a nickel version of this mineral. In anoxic
 sediments, it is believed that this mineral is formed using a greigite intermediate from mackinawite. Ore
 bodies of this mineral are colonized and oxidized by Acidithiobacillus ferrooxidans and that oxidation is
 one of the main causes of acid mine drainage. This is found in hydrothermal deposits and is one of the most
 common sulfide minerals. For 10 points, name this mineral with formula FeS2 and sometimes called "fool's
 gold."
The lack of oxidation of this and uranium minerals from Elliot Lake, Canada has been used as evidence
 of low oxygen levels during the Paleoproterozoic era.
{pyrite} [prompt on {fool's gold}]