Lab-grown Diamond Pendant Necklace 0.25 carat tw Sterling SilverShine in the Pandora Nova Sterling Silver Lab grown Diamond Pendant Necklace. Inspired by the illusion of capturing and holding a precious fragment of light, this sterling silver pendant necklace features a 0. 25 carat round brilliant excellent cut lab grown diamond. An asymmetrical prong setting frames the stone and is attached to the chain with a hidden jump ring, making the pendant appear to float on the neckline. Wear it as a symbol of the unique