White Cubic Zirconia"CZ in Motion" Halo Stud Earrings in Platinum over .925 Silver Platinum Over Sterling Silver. Quality Stamp (.925) 30 Cubic Zirconia Stones Item Measures 11.5 mm Wide x 6 mm High x 11.5 mm Long Pierced; Sterling Silver- With Plating Post. Butterfly Clutch Earring Back. Style: Stud. Imported