Art Deco Sapphire & Diamond Engagement Ring, Antique Sapphire Platinum and 18k Gold Ring, Approximate Size US 7.25 This amazing ring is c.1920s, a striking, unusual Art Deco design with a wide geometric setting holding a square cut Sapphire and round diamonds. The metal is 18k yellow gold with a Platinum setting. The setting measures 15.8 x 5.7mm, the Sapphire is approx. 3mm, surrounded by eight diamonds approx. 1.4mm each. The band width is approx. 1.8mm, some slight flattening around the...