18K/PLAT LAB EMERALD & DIA PENDANT & CHAIN: 18K yellow gold and platinum pendant contains one oval cabochon-cut lab-created emerald. Weight: approx. 2.50 Ct. One round, brilliant-cut diamond. Weight: approx. .10 Ct. Rated VS in clarity and G-H in color. The emerald and diamond are prong set. 18K 18'' chain with lobster claw clasp. Total weight: 3.8 grams.