Sterling Silver Black and White Diamond Pendant Necklace (1/4 cttw), 18" Sterling silver necklace featuring twisting drop pendant encrusted with black and white diamond rounds Rolo chain with lobster-claw 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.