Different Graphics for special rings?

[Butz]

Well, at the moment, all rings look alike, whether it's a Ring of Speed +1, or the coveted Ring of Fighting. So, I was thinking I'd try to make alternate graphics for the rare rings, like maybe a ring with a feather design (signifying speed) for a Ring of Thieves, or just give them different gems or something.
Unfortunately, I don't know all the different rare rings, so if anyone can tell me some of them, it'd be greatly appreciated.
Oh, and if you have any rings designed, feel free to post them. Just trying to get some variety in the graphics is all, (and perhaps make rings easier to identify. Think of it this way, if a Ring of Fighting looks different from every other ring, then you can't get tricked into getting a different ring instead when you buy it from someone.)