U.S. DEPARTMENT OF THE INTERIORBUREAU OF LAND MANAGEMENT
Mineral development is an important land use within BLM's multiple-use program. Mineral productin on public land in Colorado involves three distinct categories: locatable, leasable, and salable minerals.
In addition, certain other solid minerals available on public land, or "non-energy leasables", including sodium, potassium, potash, trona, and phosphate are available for development through the leasing program. The majority of the minerals leased under this program are developed to make fertilizer and as feed stock (mineral supplement for livestock).
Salable Mineral Material
BLM sells mineral materials to the public at fair market value, but gives them free to states, counties, or other government entities for public projects. Also a limited amount may be provided free to non-profit groups. Materials obtained free of charge cannot be bartered or sold. BLM shares a portion of the revenues from the sale of mineral materials with the state where the minerals are produced.
United States Geologic Survey (USGS), Mineral Resources Program
BLM Montana brochure, Do you really own the minerals under your land?
United States Forest Service (USFS), Minerals and Geology Management
Colorado Geological Survey, Colorado Mineral Resources