Features: Quick Ship Earring Back: Post Setting: Prong Shape: Round Stone Cut: Round Stone Millimeter Measurement: 4.5 Mm Length Metal Color: Yellow Earring Length: 1/4 Inch Earring Width: 1/4 Inch Care: Wipe Clean Stone Type: 40 Lab Created Sapphire, 2 Genuine Aquamarine Authenticity: Lab Created Stone Birthstone: March Birthstone Earrings Style: Stud Earrings Metal: 10k Gold 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.