The perfect minimalist chain, the Linnea Necklace has sleek, smooth links and a lab-grown diamond accent on the clasp. The Fine Print: Metal: 18k gold vermeil - a 2.5 micron layer of gold over sterling silver. Closure: Lobster Lab-Grown Diamond Carat, Color and Quality: Stone Color: E/F Stone Clarity: VS1 0.003 CTW What is Lab-Grown?