This one-of-a-kind alexandrite and diamond halo necklace is 18 inches in length, made of 14K yellow gold, and weighs 2.0 DWT (approx. 3.11 grams). It contains one oval cut, multi color alexandrite weighing 1.27 CT and 16 round G color, VS clarity diamonds weighing 0.17 CTTW. The chain is adjustable.