This unique necklace features an alluring arrangement of multi-shape lab-grown diamonds. Platinum plating over sterling silver marquise-cut and round-cut lab-grown diamonds fan out around the dazzling 2-carat round-cut lab-grown diamond center stone total lab-grown diamond weight is 2 1/2 carats independently certified a single lab-grown diamond in milgrain detailing is a signature element of the collection 15- to 17-inch adjustable cable chain; lobster clasp from the monique lhuillier bliss collection, available exclusively at kay