| Naics index | Naics index description |
|---|---|
| 212390 | Pulpstones, natural, mining and/or beneficiating |
| 212390 | Pumice mining and/or beneficiating |
| 212390 | Pumicite mining and/or beneficiating |
| 212390 | Pyrite concentrates mining and/or beneficiating |
| 212390 | Pyrite mining and/or beneficiating |
| 212390 | Pyrophyllite mining and/or beneficiating |
| 212390 | Pyrrhotite mining and/or beneficiating |
| 212390 | Quartz crystal, pure, mining and/or beneficiating |
| 212390 | Reed peat mining and/or beneficiating |
| 212390 | Rock salt mining and/or beneficiating |