Judith Ripka Lace Collection necklace. The necklace is 17 inches in length, made of 18K yellow gold, and weighs 16.6 DWT (approx. 25.82 grams). It also has one oval quartz weighing 13.43 CTTW, and 23 round G-color, VS-clarity diamonds weighing 0.34 CTTW.