We live in a new neighborhood that is built in an area that had not had much past development, but my son has a cheap metal detector and apparently is finding some odds and ends that appear to have some age in a random spot in the woods behind our house. He's found a little bit of glass there too that appears to have some age as well as it has purpled. Nonetheless, the photo shows two items he found...one looks like a 22 bullet but there is some sort of strange protrusion from the shell and the other is a rivet (like for a piece of clothing) that has something impressed on it (maybe a flattened eagle or a cross or something?). Anyone have any ideas? I promised my son I'd try to figure out what these were.