This is a magnifying glass necklace (accessory). I received it about 40 years ago from a fashionable punk friend who I begged to give it to me. For some reason, I fell in love with it at first sight back then. To be honest, I have no idea what it is. There are noticeable scratches on the lens, and adhesive marks around the edges. The diameter of the round part is about 5.5cm. I don't think it's anything particularly valuable, but it might be a stylish item depending on how you use it? I plan to ship it via Yu-Packet Post Mini. No claims and no returns, please.