Sterling Silver White Gold Plated with Sapphire Blue Cubic Zirconia Square Stud Earrings. These dainty earrings feature square-cut blue cubic zirconia stones outlined with smaller round-cut white cubic zirconia. Crafted of .925 sterling silver, these earrings secure with butterfly clasps. Measurement 7mm 2 Butterfly clasp Polished finish Imported Product Specifications 7mm N/Z Material & Care Sterling silver Clean with a soft cloth.