Sterling Silver Black and White Diamond Double-Heart Pendant Necklace (1/4 cttw), 18" Sterling silver necklace with slanted double-heart pendant accented with white and black diamonds Spring-ring clasp Black diamonds may have been treated to improve their appearance or durability. 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.