Trustmark 925 Sterling Silver 6mm Fiery White Created Opal Ball Stud Post Earrings, Lorraine Features our popular 6mm bead or ball size which measures about 1/4 of an inch. Made with brilliant and fiery created White Opals! Professionally hand-set in our own US studios. Style or Setting: Solid 925 Sterling SilverCup post for Pierced Ears.