Featuring 12 lab-grown red sapphires and a single diamond set in a graduating shape, the Curve Necklace is a quintessential choice for everyday wear and layering. The Fine Print: Metal: 18K gold vermeil - a 2.5 micron layer of gold over sterling silver Setting: 3-prong Stone Type: Lab-grown red sapphire and diamond Stone Shape: Round cut Closure: Spring ring Lab-Grown Sapphire Carat: 1.2 CTW DEW Lab-Grown Diamond Carat, Color and Quality: Stone Color: E/F Stone Clarity: VS1 0.1 CTW What is Lab-Grown?