Nickel-free Sterling silver stud earrings featuring 7mm 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 Cubic Zirconia pieces are always set and never glued on. Depending on the styles, Bocajewelrystore.com uses both machine-cut and hand-cut Cubic Zirconia stones. Bocajewelrystore.com guarantees that our Sterling silver merchandise is 925 Sterling or above.