Love Knot Sterling Silver and 14k Gold Double Heart Diamond Pendant Necklace, 18" The classic heart necklace is redefined with a diamond-encrusted open heart resting off-center along a box chain, while a 14k yellow gold heart dangles from the pendant. All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free. Imported Carat weight listed is the total for all stones.