| Lat / long: | 43.70246, -103.6864 |
| Primary: | Feldspar, Mica |
| Tertiary: | Tantalum, Niobium (Columbium), Beryllium |
| Ore: | Beryl, Columbite, Feldspar, Muscovite, Tantalite |
| Gangue: | Amblygonite, Cassiterite, Cleavelandite, Lepidolite, Spodumene, Tourmaline |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Producer |
| First production started: | 1880 |
| Host type: | Pegmatite |
| Associated type: | Pegmatite |
| Structure: | Faults, Shear Zones, Quartz Veins, Aplite Dikes |
| MRDS | SD02512 |
| DEP | 10055767 |
| Reference | {Deposit:: U. S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707, P. 149}{Deposit:: SDSMT BULL 18}{Deposit:: USGS PP 247, P. 163-170}{Production:: USGS PP 247, P. 169} |
| Reporter | Barari, Rachel A. |