Exploring The Rare Gems and Minerals in Montana (Montana ...
Montana is the best state in the U.S. for sapphire mining, and there are several locations where rockhounds can pay to dig for the valuable gem. About 15 sites in Montana claim sapphire findings. The Gem Mountain Sapphire Mine is extremely popular for its gemstone mining. It is one of those areas where sapphire mining is open for tourists as well.