Features: Quick Ship Earring Back: Post Setting: Prong Shape: Oval Stone Cut: Oval Stone Millimeter Measurement: 8 Mm Length, 6 Mm Width Metal Color: White Earring Length: 18mm Earring Width: 6mm Stone Treatment: Dyed Care: Wipe Clean Stone Type: 8 Lab Created Sapphire, 2 Genuine Onyx Authenticity: Genuine Stone 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. Quick Ship items ship directly from the manufacturer within 3 to 5 business days. Photos are enlarged to show detail.