Setting: Prong Stone Cut: Oval Stone Millimeter Measurement: 4 Mm Width, 6 Mm Length Metal Color: Yellow Chain Length: 7 1/2 Inch Chain Width: 6 Millimeters Care: Wipe Clean Stone Type: 14 Lab Created Opal Authenticity: Lab Created Stone Birthstone: October Birthstone Bracelet Type: Tennis Bracelets, Link Bracelets Metal: 14k Gold Over 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.