Official definition

This industry comprises establishments primarily engaged in developing the mine site, mining, and/or milling or otherwise beneficiating (i.e., preparing) nonmetallic minerals (except coal, stone, sand, gravel, clay, and ceramic and refractory minerals). Drylake brine operations are included in this industry, as well as establishments engaged in producing the specified minerals from underground and open pit mines. Illustrative Examples: Barite mining and/or beneficiating Phosphate rock mining and/or beneficiating Borate, natural, mining and/or beneficiating Potash mining and/or beneficiating Peat mining and/or beneficiating Rock salt mining and/or beneficiating Cross-References. Establishments primarily engaged in--