We have had a couple of these little butterfly wing cameos over the years. It is actually an iridescent blue butterfly’s wing set in sterling silver. There is a nymph type figure playing a wind instrument set on the wing as a cameo. I’m not sure what the figure is made of. It catches the light and shimmers and changes as you move it. I have seen necklaces and brooches very similar, always a dancing or musical theme. This is just 1 inch across. Sterling Silver, made in England. Clearly marked on the back. So charming.