Art Deco platinum diamond and onyx ring. The ring features a piece of emerald cut onyx, that measures 14.4×17.4mm. The onyx is collet set with a cushion cut diamond, that measures 5.8×7.1×4.85mm. Based on the measurements the diamond weighs approximately 1.60 carats. The ring weighs 3.6 dwts, and is a size 6.