The functions of the former U.S. Bureau of Mines, longtime source of mineral-resource information, have been folded into the Division of Energy and Mineral Resources of the U.S. Geological Survey. The USGS Mineral Resource Surveys Program maintains a site with numerous links to U.S. and international resource data at
And if you've ever wondered what gemstones your state may produce, see "Gemstones-An overview of production of specific U.S. gemstones," U.S. Bureau of Mines Special Paper 14-95; online at
The U.S. Minerals Management Service (MMS) oversees offshore mineral and fuel leasing arrangements, with special emphasis on the Gulf of Mexico, the Pacific Basin, and Alaska; see