Pyrite

Pyrite is also known as “fool’s gold” because of its golden, metallic appearance. In reality, pyrite is iron sulfide, and is not nearly as valuable as gold. Its name means “fire rock” and comes from the fact that striking iron against this mineral can create sparks. In Central America, the ancient Maya made mirrors from this mineral by grinding fine stones against its surface, like sandpaper, until I was polished to a mirror finish.