R15781A08 Ring by Badgley Mischka. Add a dose of drama to your look with this onyx-and-diamond cocktail ring. The statement ring features a faceted cushion-cut onyx stone outlined with white diamonds. The chic contrast of the dark center stone and the light diamonds adds modern glamour to everyday or evening attire. This ring comes in three standard sizes and can be resized professionally if needed. 18x13 octagon shaped black onyx. Cluster diamonds have a total carat weight of: .40 ctw Sterling silver.