Stone Mining & Quarrying
Key Figures
Figures are published for NAICS 21231 directly.
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Official definition
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).
Source: US Census Bureau, 2017 NAICS Definitions. Public domain.
Which code does this activity belong in?
Stone Mining and Quarrying covers establishments that extract dimension stone in rough blocks or slabs, or that mine and quarry crushed and broken stone, along with preparation plants that beneficiate stone through mechanical processes like crushing, grinding, washing, and screening. The boundary with Sand, Gravel, Clay, and Ceramic and Refractory Minerals Mining and Quarrying is determined by the type of material extracted; sand and gravel operations, as well as clay and ceramic mineral extraction, are classified separately. Stone mining differs from Other Nonmetallic Mineral Mining and Quarrying, which covers minerals such as barite, phosphate rock, borate, potash, and peat.