Features: Quick Ship Earring Back: Friction Setting: Prong Shape: Butterfly, Animals Stone Cut: Pear Stone Millimeter Measurement: 3 Mm Width, 4 Mm Length Metal Color: White Care: Wipe Clean Stone Type: 4 Lab Created Opal, 8 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.