Diamond, Platinum Ring The ring features a round brilliant-cut diamond measuring 8.40 - 8.51 x 4.96 mm and weighing 2.13 carats, enhanced by single-cut diamonds, set in platinum. A GIA report # 5171697832, dated June 22, 2016, statingK color, SI2 clarity, accompanies the center diamond. Gross weight 6.20 grams. Size: 7-1/4 (sizeable)