18k yellow gold diamond Tennis Necklace made by our master jeweler. The necklace contains 16.84 carats in natural round brilliant cut diamonds and is 16 inches long. Our team of GIA Graduate Gemologists handpick and match each diamond by color, clarity, and cut to ensure unified quality and brilliance for generations. The single largest diamond on the Tennis Necklace (in the center) is a GIA Certified 0.82 carat VS2 Clarity J Color round brilliant cut diamond.