This U.S. industry comprises establishments primarily engaged in developing the mine site, mining and/or milling, or otherwise beneficiating (i.e., preparing) nonmetallic minerals (except stone, sand, gravel, clay, ceramic, refractory minerals, and chemical and fertilizer minerals). Illustrative Examples: Gypsum mining and/or beneficiating Soapstone mining and/or beneficiating Mica mining and/or beneficiating Talc mining and/or beneficiating Pyrophyllite mining and/or beneficiating Cross-References. Establishments primarily engaged in--