This stunning cube cut black onyx is set in a sterling silver bezel and platform with a half dome sterling silver ring band. The cabochon is 20mm and the whole height of the ring is about 5mm. The stone has been cut into a circle, but the cube cut of the surface of the stone has led to a octagon setting. Because of the cut, this ring catches the light and sparkles with light. Each angle brings out a different side to this geometric ring!