This one-of-a-kind oval blue sapphire and diamond halo necklace is 16 inches in length, made of 18K white gold, and weighs 21.6 DWT (approx. 33.59 grams). It contains 19 oval cut, blue sapphires weighing 8.38 CTTW and 266 round G color, VS clarity diamonds weighing 3.08 CTTW.