Minerals
Minerals includes both metalliferous and non-metalliferous minerals; all hydrocarbons, including oil and gas, coal and lignite of all ranks; geothermal resources; and includes but is not limited to, sand, gravel, pumice, cinders, granite, building stone, limestone, clay, silt, or any other energy or non-energy mineral.
Source
25 CFR § 211.3
Scoping language
As used in this part, the following words and phrases have the specified meaning except where otherwise indicated: