Crisp and lustrous 14 karat white gold with 12 sparkling lab-grown diamonds 0.499 Carats (ctw) glimmer and glow across this tennis bracelet that is sure to make a statement. Lab-grown diamonds are man-made diamonds that are chemically, physically, and optically identical to diamonds originating from nature. Both have the same chemical composition and atomic structure, producing the very same durability, fire, and sparkle.