NAICS
21231: Stone Mining and Quarrying
This industry comprises (1) establishments primarily engaged in
developing the mine site, mining or quarrying dimension stone (i.e.,
rough blocks and/or slabs of stone), or mining and quarrying crushed
and broken stone and/or (2) preparation plants primarily engaged in
beneficiating stone (e.g., crushing, grinding, washing, screening,
pulverizing, and sizing).
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