Features: Quick Ship Earring Back: Post Setting: Prong Shape: Animals Stone Millimeter Measurement: 7 Mm Width, 10 Mm Length Metal Color: White Earring Length: 4mm Earring Width: 12mm Care: Hand Wash Stone Type: 10 Lab Created Opal, 76 Lab Created Sapphire 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.