21231

Analysis

NAICS 21231 is the 2022 NAICS industry for stone mining and quarrying, part of 2123 (Nonmetallic Mineral Mining and Quarrying). Census lists 78 example activities under it in the official index.

County Business Patterns counts 2,440 US establishments in this code in 2023, employing 43,124 people at an average annual payroll of $79,030 per employee (67th percentile of national industries). 29% of the establishments have fewer than five employees, which is close to the national mix.

Across its national industries Census lists 78 index entries; typical ones are argillite mining or quarrying, agricultural limestone mining and/or beneficiating, diorite crushed and broken stone mining and/or beneficiating and basalt crushed and broken stone mining and/or beneficiating.

Its goods appear in 24 statistical lines of the US tariff schedule, mostly under headings 2516 (granite, porphyry, basalt, sandstone and other monumental…), 2506 (quartz (other than natural sands); quartzite, whether or…) and 2515 (marble, travertine and other calcareous monumental or…). That link is how import data is matched to domestic producers, for example in trade-remedy cases.

It splits into 4 more detailed codes. The largest by establishments is 212312 (Crushed and Broken Limestone Mining and Quarrying) with 1,376.

Its more detailed codes are 212311 Dimension Stone Mining and Quarrying (379 establishments), 212312 Crushed and Broken Limestone Mining and Quarrying (1,376 establishments), 212313 Crushed and Broken Granite Mining and Quarrying (251 establishments) and 212319 Other Crushed and Broken Stone Mining and Quarrying (434 establishments).