ART DECO PLATINUM OLD EUROPEAN CUT DIAMOND RING: Platinum ring contains 1 old European round cut diamond. Weight: .50 Ct. Approx. Rated VS2 in clarity and J in color. 18 old European round cut diamonds. Weight: .75 Ct. Approx. Rated VS-SI in clarity and H-I in color. The diamonds are prong set. Weight: 4.1 grams.