Simulated Opal Round Stud Earrings 14Kt Yellow Gold & Sterling Silver Solid .925 Sterling Silver with 14Kt Yellow Gold Plating & Solid 14Kt Yellow Gold Posts & Pushbacks 14Kt Stamp 8mm Simulated Opals (Amazing Fire) Comes in jewelry box All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free.