1.54 Art Deco Marquise Diamond Engagement Ring in Platinum. The primary stone has a very faint, creamy yellow tone that adds a bit of elegant contrast to the colorless accent diamonds. Four .10 carat accent marquise diamonds are angled at either side of the primary gemstone, creating an elegant junction from center stone to the platinum band. Two .09 carat secondary accent diamonds rest on the shoulders of the band. This Art Deco ring is angular and brilliant, introducing a new shape and style to classic engagement rings!