Helen Beryl
ProspectSurface-UndergroundUSGS MRDS
Location
| State | South Dakota |
| County | Custer |
| Coordinates | 43.71276, -103.69697 |
Commodities
| Tertiary | Tantalum, Niobium (Columbium) |
Mine Details
| Status | Prospect |
| Type | Surface-Underground |
| Data Source | USGS MRDS |
| Source ID | 10299140 |