This New York Jewelers Signature Sapphire and Diamond halo necklace is 17 inches in length and weighs 22.7 DWT (approx. 35.3 grams). It contains one oval vivid blue sapphire weighing 2.87 CT of Madagascar origin with GRS certification, 9 oval blue sapphires weighing 4.30 CTTW, 202 round G color, and VS clarity diamonds weighing 7.85 CTTW.