Estate Sterling Silver Ring w Abalone Hearts- Size 9. This sterling silver ring was purchased at an estate sale and is. signed.925 with no makers mark. It features w abalone hearts with. what appears to be 2 tiny diamond accents (have not been tested). It was found in great estate condition with no noticeable flaws but may. need some polishing depending on taste. Metal: Silver. Material: Shell. Metal Purity:.925. Sterling Size: 9. Main Stone: Abalone