I have this pendant in raw brass, and it is so beautiful. It's simple and unassuming, yet elegant. I get tons of compliments on it, and then I get to tell people what it means, and point out the orbit of Ceres. (Thereby either proving or utterly undermining my coolness...one or the other, and I'm not sure which). My favorite find on Shapeways!
I'd be hesitant to get this in solid silver, because it's a softer metal, and some of the orbits might get bent. It's fine in brass, though.
was asking about the chain, and yep, it doesn't come with a chain. But that's easy. If you have a local bead shop, or access to a Joanne's/Hobby Lobby or even Amazon, 18 inches of solid brass chain and an alligator clasp will cost you a couple bucks at most.