Marquise Diamond Shoulder Set Ring Diamond Heaven Platinum Marquise 0.31ct Diamond Single Stone Ring Hancocks Jewellers Platinum Centre Marquise And Diamond Shoulder Ring 1960s Marquise Round Cluster Diamond platinum Cocktail Ring For Sale at 1.0ct Marquise Shaped Diamond Ring with Diamond Set Shoulder in 18ct. Platinum marquise diamond (0. 7ct SI G H) ring. Enhanced with rising diamond set shoulders. Total carat weight approximately 1. 24ct. 2mm wide flat court comfort fit band. Video is for design style purposes only.