Featuring 12 lab-grown yellow sapphires and a single diamond set in a graduating shape, the Curve Necklace is our quintessential choice for everyday wear and layering. The Fine Print: Metal: Sterling silver Setting: 3-prong Stone Type: Lab-grown yellow sapphire and diamond Stone Shape: Round cut Closure: Spring ring Lab-Grown Sapphire Carat: 1.31 CTW DEW Lab-Grown Diamond Carat, Color and Quality: Stone Color: E/F Stone Clarity: VS1 1.31 CTW What is Lab-Grown?