Thank you for viewing. I believe this is some kind of craft item. As there is verdigris, I think it is made of copper or brass. It weighs 300g and feels substantial. It would look luxurious if used as a coaster. Please check the photos for the size and condition. I don't know much about it, so price negotiations are possible. After proper packaging, I will ship via Yu-Packet Post Mini. Please refrain from purchasing if you are sensitive to imperfections or are looking for a perfect item. If you are satisfied with the above content and photos, please proceed with the purchase. If you understand, you can purchase immediately or without a comment.