RETRO DECO PLATINUM 2 CT OLD EUROPEAN CUT DIAMOND RING: Platinum ring contains one old European round cut diamond. Weight: 2.10 Ct. Approx. The diamond is rated VS1 in clarity and L in color. Twenty round brilliant cut diamonds. Weight: .60 Ct. Approx. The diamonds average VS in clarity and G-H in color. The diamonds are prong set. Weight: 4.3 grams. Size 7.