| Lat / long: | 43.7494, -103.70835 |
| Primary: | Beryllium, Mica, Lithium |
| Ore: | Amblygonite, Beryl, Lithiophilite, Muscovite, Spodumene |
| Gangue: | Albite, Microcline, Quartz |
| Orebody form: | DIKE-LIKE |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Past Producer |
| Host type: | Granite |
| Associated rock: | Graphitic Granite;Pegmatite |
| Associated type: | Pegmatite |
| MRDS | SD02316 |
| DEP | 10055697 |
| Reference | U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 770 |
| Reporter | Barari, Rachel A. |