Features: Nickel Free, Quick Ship Earring Back: Omega Setting: Prong Stone Cut: Oval Stone Millimeter Measurement: 8 Mm Length, 6 Mm Width Metal Color: White Earring Length: 15.1mm Earring Width: 13.1mm Care: Hand Wash Stone Type: 2 Lab Created Opal Authenticity: Lab Created Stone Birthstone: October Birthstone Earrings Style: Stud Earrings Metal: Sterling Silver Country of Origin: Imported Gemstones may be treated and may require special care. Metal may be rhodium plated to enhance appearance and reduce tarnishing. Quick Ship items ship directly from the manufacturer within 3 to 5 business days. Photos are enlarged to show detail.