Our earring charms come in a few materials....some are sterling silver or bronze, while some are surgical steel with painted Passion Flower metal embedded in a bezel with a glass dome. The cast charms are all based on real drawings by core artists who have worked at Passion Works over the years. Ear wires are either sterling silver or stainless steel. If you need a larger quantity of charm earrings for an event or occasion, please email Amy at amy@passionworks.org prior to placing your order.