| 212390 |
Asphalt, native, mining and/or beneficiating |
| 212390 |
Barite mining and/or beneficiating |
| 212390 |
Barium ores mining and/or beneficiating |
| 212390 |
Barytes mining and/or beneficiating |
| 212390 |
Borate, natural, mining and/or beneficiating |
| 212390 |
Borax, crude, ground or pulverized, mining and/or beneficiating |
| 212390 |
Boron compounds prepared at beneficiating plants |
| 212390 |
Boron mineral mining and/or beneficiating |
| 212390 |
Brimstone mining and/or beneficiating |
| 212390 |
Burrstones, natural, mining and/or beneficiating |