Wouldn't it be the sole property of the owner of the property? Anyway, if he just kept quiet and sold the stuff to private dealers, he would have been better off.
That's the trouble with these young people. They had to go shooting off their mouths about their find. They wanted the 15 minutes of fame. Let's see if they actually get to keep any of it. Look at that that guy who found a sunken galleon full of treasure. It was in litigation for years.