Jewelry Closure: Spring Ring Clasp Link Construction: Solid Setting: Prong Stone Cut: Round Stone Millimeter Measurement: 6 Mm Width Metal Color: Rose Chain Length: 18 Inch Pendant Length: 16.6mm Pendant Width: 9.4mm Chain Construction: Rope Care: Hand Wash Stone Type: 1 Lab Created Opal, 13 Lab Created Sapphire Authenticity: Lab Created Stone Birthstone: October Birthstone Metal: 10k Rose Gold Over Silver Necklace Type: Pendant 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.