This lab-grown diamond necklace from the unstoppable love​ collection celebrates the one you'll never stop loving. 10k white gold a 3/4-carat heart-shaped lab-grown diamond continuously moves and sparkles from every angle, just like your love round-cut lab-grown diamonds line the heart-shaped lock frame and bail independently certified total lab-grown diamond weight is 1 1/2 carats 16- to 18-inch adjustable cable chain with spring ring clasp