14k Yellow Gold 4 mm Square Created Opal Friction-Back Post Stud Earrings METAL PURITY: All of our jewelry for women and men are maunfactured with authentic metals and are tested to pass FTC regulations on jewelry. They are solid stamped 14k yellow/white gold, 10k yellow/white gold or stamped 925 sterling silver. GIFT PACKAGING: Each item is wrapped in a beautiful jewelry gift box. Perfect for mom, dad, grandma, daughter, sister or nana for his or her anniversary, birthday, Christmas, Valentines day, wedding, bat mitzvah, singles day or quiceanera gifts. SATISFACTION GUARANTEE: To ensure you are completely satisfied with your purchase, we offer a 45 day money back guarantee! Your satisfaction is our #1 Priority! Please contact us with any issues and we will do our best to resolve it quickly.