This turned into quite an epic treasure hunt! I think I found a petrified shark tooth while metal detecting an old homestead? This might not be odd where you live, but it's been a minute since sharks inhabited the Montana area. This turned out to be quite a nice metal detecting day. We found old tokens, old buttons, a skeleton key, thimble, a couple of old rings, old coins and other great relics. We ended up saving quite a bit of history.