Awesome :) For those with even less of a chemistry background than I have: rust is iron oxide, and pyrite is iron sulfide. It's a good analogy because oxygen

Awesome :) For those with even less of a chemistry background than I have: rust is iron oxide, and pyrite is iron sulfide. It's a good analogy because oxygen and sulfur are in the same group (column) in the periodic table, so they have some chemical similarities.