Circumference: 7 1/4 Inch Jewelry Closure: Lobster Clasp Setting: Prong Shape: Oval Stone Cut: Oval Stone Millimeter Measurement: 5 Mm Width, 7 Mm Length Metal Color: Two Tone Pendant Length: 5mm Care: Wipe Clean Stone Type: 8 Genuine Onyx, 16 Lab Created Sapphire Authenticity: Genuine Stone Bracelet Type: Tennis Bracelets Metal: 10k Gold, 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.