Pyrite is iron sulfide, a mineral composed of sulfur and iron. It's also known as "Fools'Gold" because of its shiny yellowish metallic luster. Pyrite can be found in sedimentary, magmatic, and...
That is a rather vague question. Pyrite can be found in virtually every rock type as well as formed within bacteria and meteorites. So you could say it will form almost everywhere given the right...