.55 Black Diamond Necklace in 14K Yellow Gold.  This enchanting 18” necklace features a .55 carat natural black diamond in 14k yellow gold.  The teardrop black diamond is set in four prongs. At the necklace bail, a .015 carat natural diamond accentuates the peak of the primary stone. This modern black diamond necklace will look fabulous paired with your favorite LBD!