Setting: Prong Stone Cut: Oval Stone Millimeter Measurement: 6 Mm Length, 4 Mm Width Metal Color: White Chain Length: 7 1/2 Inch Chain Width: 6 Millimeters Chain Construction: Casted Care: Wipe Clean Stone Type: 20 Lab Created Sapphire, 20 Lab Created Opal Authenticity: Lab Created Stone Birthstone: October Birthstone Bracelet Type: Link Bracelets, Tennis Bracelets Metal: Sterling Silver 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.