As you can see, this item has two holes like it was made into a button. It also has a hole in the edge, though, which makes me wonder if it was used for something else. It was found near furtrade items and I assume it was Native drilled. The bigger question to me is what was it originally. I can't make out all the letters yet, but one word is ROI. It looks like a lion and a unicorn. I can do better pics with natural light tommorrow if needed. Thanks for any help.