Feldspar, Mica, Beryllium Mines
10Total Sites
1Active
Top States
| State | Sites |
|---|---|
| South Dakota | 8 |
| Colorado | 2 |
Notable Sites
| Mine | State | County | Status |
|---|---|---|---|
| Unknown | Colorado | Park | Producer |
| Big Spar No. 1 Mine | South Dakota | Custer | Past Producer |
| Bigger Mica Mine | Colorado | Jefferson | Past Producer |
| Dan Patch Group | South Dakota | Pennington | Past Producer |
| Earl Lode | South Dakota | Custer | Past Producer |
| Elkhorn Mine | South Dakota | Custer | Past Producer |
| Jumbo Lode | South Dakota | Custer | Occurrence |
| Payday Lode | South Dakota | Custer | Past Producer |
| Ponca Group | South Dakota | Pennington | Past Producer |
| Wonder Lode | South Dakota | Custer | Past Producer |