I may have mentioned before that my husband is a geologist. A couple of years ago he went on a field trip and came home with a large chunk of mud. (This is not an unusual occurence.) But it wasn't just any mud, it was mud with pyrite in it. So we put it in a bowl and covered it with water and spent the next couple of days sticking our hands into it and fishing out what turned out to be hundreds of little pyrite crystals. And as cool as they are, they just sat in a bowl for the next 2 years.
Then a couple of weeks ago I was at Urban Outfitters and I found a pyrite ring. And their pyrite was not even as pretty as our pyrite. So I obviously had to make a ring out of our pyrite that was way cooler than theirs. Here's how I did it: