Share the love with the sweet details of this lab-grown diamond open heart necklace. 10k yellow gold with white rhodium a heart-shaped lab-grown diamond center shines in a halo of round-cut lab-grown diamonds and a polished open heart frame more round-cut lab-grown diamonds line the bail total lab-grown diamond weight is 3/8 carat independently certified 18-inch rope chain; spring ring clasp from the kay lab-grown diamonds collection