White and Black Cubic Zirconia Platinum over .925 Silver Halo Stud Earrings Platinum Over Sterling Silver. Quality Stamp (.925) 52 Cubic Zirconia Stones Item Measures 11 mm Wide x 4 mm High x 16 mm Long Pierced; Sterling Silver- With Plating Post. Butterfly Clutch Earring Back. Style: Stud. Imported