The Jennifer Behr x Julia Berolzheimer Cove Earrings are made by hand in New York from 18K gold plated brass, crystal pearl, and natural turquoise, epidote, aventurine, and rose quartz stones. All stones have natural variances in color and markings that make each one unique. These earrings have a surgical-steel post, are nickel-free, and safe for sensitive skin. We recommend storing earrings in their dust bag while not in use, and avoiding contact with water, perfume, hairspray, and other chemicals.