Taking center stage in this one-of-a-kind necklace is a 0.59 ct. heart shape black onyx adorned by 30 single cut diamonds G-H color, VS clarity weighing .09 CTTW. This necklace is made of 14K yellow gold and weighs 1.4 DWT (approx. 2.18 grams). It measures 18 inches in length with adjustments.