Update your elegant style with this drop necklace—featuring lab-grown diamonds in invisible settings for a seamless, shimmering look. 14k white gold a vertical row of marquise-cut lab-grown diamonds graduates in size to a pear-shaped lab-grown diamond drop total lab-grown diamond weight is 1 1/2 carats independently certified 16- to 18-inch adjustable cable chain; lobster clasp from the kay lab-grown diamonds collection