Antique Engagement Ring Art Deco .75 Old European Cut Diamond in PlatinumThis platinum, Art Deco Era diamond engagement ring has all the geometric elements of the period. It features a beautiful . 75ct Old European cut diamond which is box set, and raised slightly above the rest of the mounting. The ring has a three marquise shaped leaves which flank either side and hold small prong set diamonds. In total, ten (10) diamonds are prong set around the center stone.