PRICES MAY VARY. Genuine Black Onyx : pure natural Black Onyx, the whole ring is made of 925 sterling silver. Oxidation effect on the outer layer, presenting a retro and classic style. Size: Oval Black Onyx is : 8mm X 6mm, there are size 5,6,7,8,9,10,11,to choose from. Please confirm the size of your finger before purchasing. Special Gift: This Black Onyx rings comes with a delicate dark green gift box, perfect as a gift for your family, friends. After Sales Service:Your happiness is our number