Featuring 12 lab-grown emeralds 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: Sterling silver Setting: 3-prong Stone Type: Lab-grown emerald and diamond Stone Shape: Round cut Closure: Spring ring Lab-Grown Emerald: 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?