Features: Quick Ship Earring Back: Post Setting: Prong Shape: Oval Stone Cut: Oval Stone Millimeter Measurement: 8 Mm Length Metal Color: White Earring Length: 12.7mm Earring Width: 11.5mm Care: Wipe Clean Stone Type: 2 Lab Created Opal, 28 Genuine Topaz 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.