Features: Quick Ship Jewelry Closure: Spring Ring Clasp Link Construction: Solid Setting: Prong Stone Cut: Round Stone Millimeter Measurement: 3 Mm Width, 3 Mm Length Metal Color: White Chain Length: 18 Inch Pendant Length: 22mm Pendant Width: 16mm Chain Construction: Box Care: Wipe Clean Stone Type: 6 Lab Created Opal, 5 Lab Created Sapphire Birthstone: October Birthstone Metal: Sterling Silver Necklace Type: Pendant 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.