This is a very unusual black onyx and diamond ring. I've never seen one like this. 10kt yellow gold ,scroll work with white gold holding sparklet diamond in the center. The perfect black onyx is domed on top and the ring looks like a by pass setting although completely soldered in the back. A rare find. Makers mark is Dason 10kt. Size 6.5. This beauty has been professionally cleaned and checked and is ready to wear.