Interchangeable Charm Earrings by Devienna Anggraini These interchangeable charm earrings are fun to play with, and come up with different earrings for each day. Wear either charm on its own, or together. It's like two pairs of earrings in one! The hoop that goes through your ear is sterling silver and hypoallergenic. The metal in the charms is white bronze, and the color is baked industrial enamel. Unlike glass enamel, the color will not chip and it will never fade.