I wondered about this topic several years ago and even though I have never found any treasure or gold I still wonder about a few things. Some of the laws applying to this seem quite un-American. Why would a person have to pay taxes on something they find on their own land? For that matter on public land, since a person, being part of the public, owns that too? (This according to American law. Personally, the concept of owning anything in the universe is questionable, but that is a philosophical issue

) I'm ABSOLUTELY all for environmental laws protecting the land, but if a person supplements their income with a little panning or discovers a placer in their back yard, it's nobody's business but theirs, and it should NEVER be taxed. It only becomes an issue if environmental disruption occurs because of excessive greed. I'll bet in areas where you buy land and don't own the mineral rights, you even have to file a claim to dig on your own property (I'm not sure about this though). Such are the musings of a future respectful desert dweller who would like to keep what she finds, maybe supplementing meager retirement
Shining sun