ANTIQUE 18K DIAMOND RING W/ 1 CT CENTER: 18K white gold ring contains one old European round cut diamond. WEIGHT: 1.00 Ct. Approx. Rated SI2 in clarity and G in color. Eighteen old mine cut diamonds. Weight: .55 Ct. Approx. Rated SI in clarity and G-H-I in color. The diamonds are prong set. Weight: 3.4 grams. Size: 8