Features: Quick Ship Jewelry Closure: Spring Ring Clasp Setting: Prong Stone Cut: Round Stone Millimeter Measurement: 5 Mm Width, 5 Mm Length Metal Color: Yellow Chain Length: 18 Inch Pendant Length: 16mm Pendant Width: 11mm Chain Construction: Box Care: Wipe Clean Stone Type: 24 Lab Created Sapphire, 1 Genuine Blue Topaz Authenticity: Genuine Stone Birthstone: December Birthstone Metal: 18k Gold Over 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.