Unlock their heart with this lab-grown diamond necklace from the unstoppable love collection. 10k white gold features a heart-shaped lock lined with shimmering round-cut lab-grown diamonds at the center, a round-cut lab-grown diamond continuously moves and sparkles from every angle, just like your love independently certified with a total lab-grown diamond weight of 1 carat 16- to 18-inch adjustable cable chain with spring ring clasp