| Naics index | Naics index description |
|---|---|
| 212390 | Strontianite mining and/or beneficiating |
| 212390 | Strontium mineral mining and/or beneficiating |
| 212390 | Sulfate, sodium, mining and/or beneficiating |
| 212390 | Sulfur mining and/or beneficiating |
| 212390 | Sulfur, native, mining and/or beneficiating |
| 212390 | Talc mining and/or beneficiating |
| 212390 | Tripoli mining and/or beneficiating |
| 212390 | Trona mining and/or beneficiating |
| 212390 | Turquoise mining and/or beneficiating |
| 212390 | Ulexite mining and/or beneficiating |