Earring Back: Friction Setting: Prong Stone Cut: Round Stone Millimeter Measurement: 6 Mm Length, 6 Mm Width Metal Color: White Earring Length: 11.3mm Earring Width: 11.3mm Care: Wipe Clean Stone Type: 24 Lab Created Sapphire, 1 Lab Created Opal Authenticity: Lab Created Stone Birthstone: October Birthstone Earrings Style: Stud Earrings 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. Photos are enlarged to show detail.