Features: Quick Ship Jewelry Closure: Spring Ring Clasp Setting: Prong Shape: Round Stone Cut: Oval Stone Millimeter Measurement: 8 Mm Width, 10 Mm Length Metal Color: White Chain Length: 18 Inch Chain Construction: Box Care: Wipe Clean Stone Type: 1 Simulated Aquamarine Authenticity: Simulated Stone Birthstone: March 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.