NAICS Code 21 Companies ... NAICS Code 212 Companies ... NAICS Code 2123 Companies ... NAICS Code 21232 Companies
Sand, Gravel, Clay, and Ceramic and Refractory Minerals Mining and Quarrying
This industry comprises (1) establishments primarily engaged in developing the mine site and/or mining, quarrying, dredging for sand and gravel, or mining clay (e.g., china clay, paper clay and slip clay) or ceramic and refractory minerals and (2) preparation plants primarily engaged in beneficiating (e.g., washing, screening, and grinding) sand and gravel, clay, and ceramic and refractory minerals.
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