| Naics index | Naics index description |
|---|---|
| 212290 | Vanadium ores mining and/or beneficiating |
| 212290 | Wolframite mining and/or beneficiating |
| 212290 | Wulfenite mining and/or beneficiating |
| 212290 | Zirconium concentrates beneficiating |
| 212290 | Zirconium ores mining and/or beneficiating |
| 212311 | Argillite mining or quarrying |
| 212311 | Basalt mining or quarrying |
| 212311 | Bluestone mining or quarrying |
| 212311 | Calcareous tufa mining or quarrying |
| 212311 | Diabase mining or quarrying |