Materials: 14k White Gold Gemstone: Natural Ruby Total Ruby Carat Weight: 0.37 ct. Stud Diameter: 4mm x 4mm Description: This listing is for a pair of studs. These are natural rubies. These are not lab grown gemstones. Beautiful ruby studs with 2 rubies totaling 0.37 ct. Be sure to hit the favorite button or add it to your wishlist! The studs will be beautifully packaged in a jewelry box, with a drawstring bag that will be provided for you to travel with your new jewelry! Perfect for gift giving! Feel free to message me with any questions! I will respond within 24 hours, if not even sooner!