Stones: Lab-created white opals Dimensions: 7.45x7.45mm Features: Quick Ship Earring Back: Post Stone Cut: Round Metal Color: White Care: Wipe Clean 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.