This one-of-a-kind marquise ruby and diamond halo necklace is 18 inches in length, made of 14K yellow gold, and weighs 4.0 DWT (approx. 6.22 grams). It contains one marquise cut, ruby weighing 1.14 CT and 14 round G color, VS clarity diamonds weighing 0.55 CTTW. The chain is adjustable. Pendant is 5/8" wide