Lots of things!
Sometimes I keep it in the jars just to look at or organise in my free time.
I also make things with it. Treasure Jars, earrings, pendants, badges (brooches), framed art pieces... all sorts of stuff. You can check out my shop and see if I have anything available at the moment.
I also like to sort the smaller pieces into even smaller jars for eventual display, or so they can just sit around my house and I can look at them.