Features: Nickel Free, Quick Ship Earring Back: Friction Setting: Prong Shape: Knot Stone Cut: Round Metal Color: Yellow Earring Length: 15.5mm Earring Width: 10mm Care: Wipe Clean Stone Type: 2 Lab Created Quartz, 48 Lab Created Sapphire Authenticity: Lab Created Stone Earrings Style: Stud Earrings Metal: 18k 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. Quick Ship items ship directly from the manufacturer within 3 to 5 business days. Photos are enlarged to show detail.