A sparkling expression of love, this lab-grown diamond heart necklace is a stunning choice. Sterling silver with 24k gold plate an open heart lined in lab-grown diamonds is the meaningful centerpiece two bezel-set lab-grown diamonds dangle on one side of the chain 1/5 ct. T. W. Of lab-grown diamonds 16. 0- to 18. 0-inch adjustable cable chain necklace; spring-ring clasp