Features: Quick Ship Jewelry Closure: Lobster Clasp Link Construction: Solid Setting: Bezel Shape: Round Stone Millimeter Measurement: 6 Mm Length, 6 Mm Width Metal Color: White Chain Length: 18 Inch Chain Width: 2 Millimeters Pendant Length: 8mm Pendant Width: 8mm Stone Treatment: Dyed Chain Construction: Cable Care: Wipe Clean Stone Type: 1 Lab Created Opal, 1 Genuine Onyx Authenticity: Genuine Stone Metal: Sterling 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. Quick Ship items ship directly from the manufacturer within 3 to 5 business days. Photos are enlarged to show detail.