Oceans: 6mm Tropical Blue Created Opal Ball Stud Post Earrings, Solid 14k Gold Add the beauty and sparkle of the Tropics to your wardrobe with our Oceans line of created Opal ball stud earrings Features our stylish 6mm bead or ball size which measures about 1/5 of an inch. Made with solid 14 karat White Gold. Professionally hand-set in our own US studio.