Jewelry Closure: Box Clasp Setting: Prong Stone Cut: Round Stone Millimeter Measurement: 3 Mm Length Metal Color: White Chain Length: 18 Inch Pendant Length: 18mm Care: Wipe Clean Stone Type: 136 Lab Created Sapphire Authenticity: Lab Created Stone Metal: Sterling Silver Necklace Type: 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. Photos are enlarged to show detail.