| 212220 |
Establishments primarily engaged in manufacturing gold or silver bullion or dore bar without mining are classified in Industry 331410, Nonferrous Metal (except Aluminum) Smelting and Refining. |
| 212230 |
Refining copper concentrates--are classified in Industry 331410, Nonferrous Metal (except Aluminum) Smelting and Refining |
| 212230 |
Developing the mine site, mining, and/or beneficiating iron and manganiferous ores valued for their iron content--are classified in Industry 212210, Iron Ore Mining. |
| 212290 |
Developing the mine site, mining, and/or beneficiating iron and manganiferous ores valued chiefly for their iron content--are classified in Industry 212210, Iron Ore Mining |
| 212290 |
Developing the mine site, mining, and/or beneficiating ores valued chiefly for their gold or silver content--are classified in Industry 212220, Gold Ore and Silver Ore Mining |
| 212290 |
Developing the mine site, mining, and/or beneficiating ores valued chiefly for their copper, nickel, lead, or zinc content--are classified in Industry 212230, Copper, Nickel, Lead, and Zinc Mining |
| 212290 |
Enriching uranium--are classified in Industry 325180, Other Basic Inorganic Chemical Manufacturing |
| 212290 |
Providing support activities (except geophysical surveying and mapping, site preparation, construction, and transportation) for the mining of metallic minerals and ores on a contract or fee basis--are classified in U.S. Industry 213114, Support Activities for Metal Mining. |
| 21231 |
Producing lime--are classified in Industry 32741, Lime Manufacturing |
| 21231 |
Quarrying and dressing dimension stone--are classified in Industry 32799, All Other Nonmetallic Mineral Product Manufacturing. |