PLATINUM, YELLOW GOLD, EMERALD, AND DIAMOND RING CONVERTIBLE TO NECKLACE ENHANCER. Emerald-cut square emerald weighing app. 2.53 ct. raised by four prongs and surrounded by 18 marquise cut diamonds together weighing app. 1.80 ct. Appraisal information available - Ring size: 4 1/2. Estimate $3,000-4,000