| Location: | Custer County, South Dakota, United States, North America |
| Lat / long: | 43.70274, -103.5775 |
| dep_id: | 10055687 |
| mrds_id: | SD02303 |
| Commodity type: | metallic and nonmetallic |
| Major mineral: | Lithium, Beryllium, Mica |
| Minor mineral: | Niobium (Columbium), Tantalum |
| Operation type: | Unknown |
| Production size: | Small ammount of material produced |
| Development status: | Past Producer |
| ore: | Amblygonite, Beryl, Columbite, Mica, Spodumene, Tantalite |
| gangue: | Albite, Apatite, Cassiterite, Cleavelandite, Lepidolite, Muscovite, Quartz, Tourmaline |
| orebody_fm: | LENS |
| work_type: | Surface/Underground |
| alteration: | Limonite Veinlets, The Stain Is Carried With Depth. The Pegmatite Is Badly Altered. |
| Reporter: | Barari, Rachel A. |
| arock_unit: | Pegmatite |
| arock_type: | Pegmatite |
| tectonic: | Black Hills |
| disc_yr: | 1900 |
| References: |
- Deposit:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707
- Deposit:: FISHER, D. J., 1945, PRELIMINARY REPORT ON THE MINERALOGY OF SOME PEGMATITES NEAR CUSTER, SOUTH DAKOTA GEOLOGICAL SURVEY REPORT OF INVESTIGATIONS 50.
- Deposit:: FISHER, D.J., 1942, PRELIMINARY REPORT ON SOME PEGMATITES OF THE CUSTER DISTRICT, SOUTH DAKOTA GEOLOGICAL SURVEY REPORT OF INVESTIGATIONS 44
- Deposit:: BIENIEWSKI, C.L., 1964, THE MINERAL INDUSTRY OF SOUTH DAKOTA IN 1962, SOUTH DAKOTA GEOLOGICAL SURVEY MINERALS REPORT 10
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