14k Yellow Gold Black Diamond Stud Earring and Pendant Set (1 cttw) Pendant is 8 mm tall and 4 mm wide. Pendant Chain Length is 18 inches.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.