| Location: | Custer County, South Dakota, United States, North America |
| Lat / long: | 43.66968, -103.64362 |
| dep_id: | 10012478 |
| mrds_id: | D008124 |
| Commodity type: | nonmetallic |
| Major mineral: | Feldspar, Mica |
| Operation type: | Unknown |
| Production size: | Small ammount of material produced |
| Development status: | Past Producer |
| ore: | Biotite, Muscovite |
| gangue: | Albite, Quartz, Tourmaline |
| orebody_fm: | IRREGULAR BRANCHING |
| work_type: | Surface |
| Reporter: | Barari, Rachel A. |
| hrock_type: | Pegmatite |
| arock_type: | Pegmatite |
| Structure: | Fractures Filled With Pegmatite |
| Year first produced: | 1942 |
| References: |
- Deposit:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.
- Deposit:: USGS PP 247, P. 173-174.
- Production:: USBM INFO CIRC 7707.
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