Sapphire & Diamond Cocktail Ring 14kt Yellow Gold. The ring has a dark, violetish/blue marquise cut sapphire (0.25ct) in the center surrounded by twenty various cut diamonds weighing 0.29cttw. The ring which was cast with the diamonds in place, is in good condition. Included is an insurance appraisal of $1200.00. Ring size is 6 Â½.