Hey, this is my first post here so I'm a little nervous... I posted this at craftgrrl yesterday so some of you may have seen it before:
They're made of resin and moulded in ice cube trays. There's a teaspoon of resin (left to harden), then a picture (inkjet printout) dipped in resin and placed on top of that, followed by another teaspoon of resin. Follow the instructions on whatever resin you buy, and I'd suggest doing this outside because it gets a little toxic. Cover it up with some kind of box while it dries to keep the dust out.
They're not too hard to get out of the trays, although sometimes a little persuasion is needed from a craft knife. The surface has to be polished or varnished somehow to shine it up and to allow the picture to show through properly. I haven't completely refined that part of the process yet so if anyone has any ideas...
Then I just drilled some holes in and attached it all together with 10mm jump rings. Hope you like!