Diamond Cushion Cut Sapphire Engagement Ring in Platinum.  This ring from the Art Deco period is simply stunning with its .75 carat Old European cut diamond and two (2) .62 carat cushion cut sapphires. The ring is finished in 18 karat white gold and is a spectacular example of the opulent style of the 1920s. Sitting high above the finger with wonderful filigree work and small accent diamonds to create even more sparkle, this ring has a bright spark that will be loved and cherished.