Nickel-free Sterling silver stud earrings featuring 4mm clear Cubic Zirconia ball studs. All of our cubic zirconia items are made with Grade A quality stones with a high-shine finish. All of our CZ pi eces are always set and never glued on. Depending on the styles, Sarraf.com uses both machine-cut and hand-cut CZ stones. Sarraf.com guarantees that our Sterling silver merchandise is 925 Sterling or above.