Features: Nickel Free, Quick Ship Jewelry Closure: Box Clasp Link Construction: Solid Setting: Prong Stone Cut: Multi-Shape Metal Color: White Chain Length: 18 Inch Stone Treatment: Color Enhanced Chain Construction: Link Care: Wipe Clean Stone Type: 37 Lab Created Sapphire, 72 Genuine Blue Topaz Authenticity: Lab Created Stone Birthstone: September Birthstone Metal: Sterling Silver Necklace Type: Collar Necklaces, Tennis Necklaces 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.