Thats not 100% accurate. Some things literally only pop out of the Earth or can be dug up in certain areas with specific geological, astronomical, etc, criteria. For example, Iridium is extremely rare and as I understand it, can only be mined in specific types of meteor craters; maybe at 4-5 sites around the world, none of which are in the US (just an example, the numbers and choice of Ir was just for illustrative purposes).