Give the gift that wrapped itself: this sophisticated lab-grown diamond and cultured pearl necklace. Platinum plating over sterling silver the open bow design shimmers with varied sizes of round-cut lab-grown diamonds beneath, a lustrous round white 7. 5mm freshwater cultured pearl gleams independently certified total lab-grown diamond weight is 1/5 carat 15. 5- to 17. 5-inch adjustable cable chain; lobster clasp from the monique lhuillier bliss collection, available exclusively at kay