Features: Nickel Free, Quick Ship Earring Back: Post Setting: Prong Stone Cut: Round Stone Millimeter Measurement: 6 Mm Width Metal Color: White Earring Length: 7mm Earring Width: 7mm Care: Wipe Clean Stone Type: 1 Lab Created Ruby Authenticity: Lead Glass-Filled Ruby Birthstone: July Birthstone Earrings Style: Stud Earrings Metal: Sterling Silver Country of Origin: Imported Lead glass-filled rubies require special care. Avoid ultrasonic cleaners, extreme heat and household chemicals and detergents to preserve the life of your stone. Wear with care and clean with warm, soapy water to maintain the beauty of the stone. 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.