Setting: Prong Shape: Oval Stone Cut: Oval Stone Millimeter Measurement: 6 Mm Length, 4 Mm Width Metal Color: White Chain Length: 18 Inch Chain Construction: Casted Care: Wipe Clean Stone Type: 98 Lab Created Sapphire Authenticity: Lab Created Stone Birthstone: September Birthstone Metal: Sterling Silver Necklace Type: Tennis Necklaces, Statement 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. Photos are enlarged to show detail.