| Lat / long: | 43.91913, -103.46278 |
| Primary: | Beryllium, Mica, Tantalum, Feldspar |
| Secondary: | Tin |
| Tertiary: | Lithium |
| Ore: | Albite, Amblygonite, Beryl, Cassiterite, Muscovite, Spodumene, Tantalite |
| Gangue: | Graphite, Quartz, Rhodochrosite, Topaz |
| Orebody form: | IRREGULAR |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Past Producer |
| Host rock: | Schist |
| Host type: | Schist |
| Associated rock: | Pegmatite |
| Associated type: | Pegmatite |
| Alteration processes: | Spodumene Altered To Sericite. Amblygonite Is Altered. |
| MRDS | D004781 |
| DEP | 10101556 |
| Reference | {Deposit:: U. S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707}{Deposit:: ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18}{Production:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707} |
| Reporter | Barari, Rachel A. |