You are viewing a fine quality 14K large two tone yellow and white gold signet style ring made in the 1980's. The ring measures 17 mm or just under 3/4" long up the finger by 23 mm or just under 1" across. Set on top is a high polished flat cabochon of Black Onyx stone. On the sides are brush finished white gold panels. The ring is marked: 585 for 14K. It is a size 11 with a thick shank and can be re-sized. The ring weighs 9.3 grams.