North American Industry Classification System (NAICS) code 21231 is used by federal buyers for market research, set-aside size standards, and reporting. Official titles come from the Census Bureau NAICS structure.
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).
- Official title
- Stone Mining and Quarrying
- Code level
- 5
- Parent industry
- Nonmetallic Mineral Mining and Quarrying 2123
- Open opportunities
- 0 open · 0 active
Excluded or separately classified activities
Official Census cross-references identify activities that belong under another North American Industry Classification System (NAICS) code.
Producing lime--are classified in Industry 32741, Lime Manufacturing; and
Quarrying and dressing dimension stone--are classified in Industry 32799, All Other Nonmetallic Mineral Product Manufacturing.
Source and edition
2022 NAICS Manual definition and reference material from the U.S. Census Bureau.