I’ve seen concrete jewelry before, and while it’s fun material to work with, I don’t think anyone’s done anything really groundbreaking with the medium. But I have to say I’m really liking these rings by Studio 22. I really like the one on the right above. I think what’s cool about it is how the shape looks somewhat gem inspired. It gives the ring a really interesting quality that lacks in a regular, round shape.
The rings should be sold through Designboom’s online store sometime in the near future for about $50. Sadly, I had trouble figuring out how the hell their online store worked, and I know what the hell I’m doing most of the time. Hopefully you have better luck than I do.