Trustmark 14k White Gold 10mm Fiery White Created Opal Ball Stud Post Earrings, Lorraine Made with our gorgeous Fiery White Created Opals! Style or Setting: Solid 14k White Gold Cup post for Pierced Ears. Features our popular 10mm bead or ball size which measures about 2/5 of an inch. Professionally hand-set in our own US studio.