Sterling Silver Black and White Diamond Round Stud Earrings (1 cttw) Round sterling silver studs featuring faceted black diamond centerpieces in halos of smaller white diamonds Friction-back posts Black diamonds may have been treated to improve their appearance or durability and may require special care. 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 both studs.