RockWoofCheck access before you go. Most sites listed here are old mines, quarries or prospects, and many are on private land or active mining claims. Get the landowner's permission, check the rules of the agency that manages any public land, and never enter mine workings. Locations are approximate.
Found alongside
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
553 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
341 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
241 sites
Tourmaline
Mohs 7–7.5. Long striated crystals, often black (schorl) or green and pink (elbaite). Mindat
155 sites
Beryl
Mohs 7.5–8. Six-sided crystals; aquamarine and emerald are beryl. Mindat
117 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
20 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Custer County (449) · Pennington County (96) · Lawrence County (8)
Sites (first 60)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Tin Mountain Mine | Cesium, Feldspar, Lithium, Mica | Albite, Amblygonite, Andesine, Beryl, Biotite, Columbite, Muscovite, Pollucite, Spodumene | Past Producer | 43.746, -103.719 |
| Peerless Prospect | Mica, Tantalum, Beryllium, Feldspar | Albite, Amblygonite, Beryl, Cassiterite, Columbite, Feldspar, Lithiophilite, Muscovite | Past Producer | 43.890, -103.420 |
| Hardesty Homestead | Beryllium, Mica, Tantalum, Feldspar | Albite, Amblygonite, Beryl, Cassiterite, Muscovite, Spodumene, Tantalite | Past Producer | 43.919, -103.463 |
| King Lithia Prospect | Lithium, Beryllium | Albite, Amblygonite, Beryl, Feldspar, Spodumene | Past Producer | 43.870, -103.392 |
| Tin Queen | Tin, Lithium, Mica, Feldspar | Albite, Amblygonite, Biotite, Cassiterite, Muscovite | Past Producer | 43.866, -103.596 |
| Sunshine Mica Prospect | Mica, Feldspar | Albite, Beryl, Biotite, Microcline, Muscovite | Past Producer | 43.785, -103.603 |
| Etta Spodumene Mine | Feldspar, Mica, Lithium, Tin | Albite, Beryl, Cassiterite, Muscovite, Plagioclase, Spodumene, Wolframite | Past Producer | 43.881, -103.419 |
| Highland Mine | Beryllium, Mica, Feldspar | Albite, Beryl, Lithiophilite, Microcline, Muscovite | Past Producer | 43.766, -103.679 |
| Earl Lode | Feldspar, Mica, Beryllium | Albite, Beryl, Lithiophilite, Muscovite | Past Producer | 43.752, -103.528 |
| Payday Lode | Feldspar, Mica, Beryllium | Albite, Beryl, Mica | Past Producer | 43.624, -103.609 |
| Helen Beryl | Beryllium, Feldspar | Albite, Beryl, Mica, Microcline | Past Producer | 43.713, -103.697 |
| Michaud Prospect | Beryllium | Albite, Beryl, Muscovite | Past Producer | 43.689, -103.719 |
| Monkey Lode | Feldspar, Beryllium, Mica | Albite, Beryl, Muscovite | Past Producer | 43.882, -103.558 |
| Warren Draw Mine | Feldspar, Beryllium, Mica | Albite, Beryl, Muscovite, Plagioclase | Past Producer | 43.744, -103.714 |
| Dorothy Lode | Feldspar, Mica | Albite, Microcline, Muscovite | Past Producer | 43.754, -103.634 |
| Pine Top Lode | Mica, Feldspar | Albite, Muscovite | Past Producer | 43.727, -103.615 |
| Tiptop Lode | Feldspar | Amblygonite, Beryl, Biotite, Muscovite | Past Producer | 43.716, -103.670 |
| Bob Ingersoll Mine | Lithium, Beryllium, Mica | Amblygonite, Beryl, Cassiterite, Cleavelandite, Feldspar, Lepidolite, Muscovite, Spodumene | Past Producer | 43.745, -103.454 |
| Oreville Spar Mica Mine | Mica | Amblygonite, Beryl, Cassiterite, Feldspar, Mica | Past Producer | 43.860, -103.626 |
| High Climb Mine | Feldspar, Beryllium, Mica, Lithium | Amblygonite, Beryl, Columbite, Feldspar, Muscovite | Past Producer | 43.852, -103.619 |
| Beecher Lode | Lithium, Beryllium, Mica | Amblygonite, Beryl, Columbite, Mica, Spodumene, Tantalite | Past Producer | 43.703, -103.578 |
| Wilhelm Mine | Feldspar, Lithium, Mica, Tantalum | Amblygonite, Beryl, Feldspar, Muscovite | Past Producer | 43.824, -103.658 |
| Eruption Lode | Lithium, Beryllium, Feldspar, Mica | Amblygonite, Beryl, Feldspar, Muscovite | Past Producer | 43.725, -103.697 |
| Dike Lode | Feldspar, Mica, Beryllium, Lithium | Amblygonite, Beryl, Feldspar, Muscovite, Spodumene | Past Producer | 43.857, -103.405 |
| Star Lode | Lithium, Beryllium | Amblygonite, Beryl, Lepidolite, Mica, Talc | Past Producer | 43.876, -103.349 |
| King Mica Mine | Feldspar, Beryllium, Mica | Amblygonite, Beryl, Lithiophilite, Muscovite | Past Producer | 43.879, -103.406 |
| Highview Prospect | Beryllium, Mica, Lithium | Amblygonite, Beryl, Lithiophilite, Muscovite, Spodumene | Past Producer | 43.749, -103.708 |
| Mountain Lion Mine | Beryllium, Lithium, Mica, Feldspar | Amblygonite, Beryl, Mica, Microcline, Spodumene | Past Producer | 43.858, -103.381 |
| Keystone Lode | Mica, Beryllium, Lithium | Amblygonite, Beryl, Muscovite | Occurrence | 43.742, -103.702 |
| Hugo Mine | Feldspar, Mica, Beryllium, Lithium | Amblygonite, Beryl, Muscovite, Spodumene | Past Producer | 43.882, -103.423 |
| Giant-Volney Mine | Tantalum, Lithium | Amblygonite, Cassiterite, Columbite, Feldspar, Lithiophilite, Spodumene, Tantalite | Past Producer | 44.377, -104.049 |
| Rough and Ready Mine | Tin | Amblygonite, Cassiterite, Columbite, Spodumene, Tantalite | Past Producer | 44.379, -104.052 |
| Century Lode Claim | Lithium, Tin | Amblygonite, Cassiterite, Spodumene | Past Producer | 43.920, -103.574 |
| Jack Rabbit Mine | Beryllium, Mica | Beryl | Past Producer | 43.692, -103.622 |
| Henwood Lode | Beryllium, Feldspar | Beryl | Past Producer | 43.649, -103.584 |
| Smith Mine | Feldspar | Beryl | Past Producer | 43.622, -103.528 |
| Greene Mine | Beryllium, Feldspar | Beryl | Past Producer | 43.628, -103.523 |
| Put Lode | Beryllium | Beryl | Past Producer | 43.854, -103.373 |
| New England Prospect | Feldspar, Beryllium, Mica | Beryl, Biotite, Feldspar, Microcline, Muscovite | Occurrence | 43.851, -103.394 |
| Jumbo Lode | Feldspar, Mica, Beryllium | Beryl, Biotite, Feldspar, Microcline, Muscovite | Occurrence | 43.833, -103.399 |
| Big Tom Mine | Feldspar | Beryl, Biotite, Muscovite | Past Producer | 43.722, -103.694 |
| Dorothy V Prospect | Mica | Beryl, Biotite, Muscovite | Past Producer | 43.758, -103.641 |
| Glendale | Feldspar, Beryllium, Tin | Beryl, Cassiterite, Feldspar | Past Producer | 43.867, -103.376 |
| Phillip and Phyllis Lodes | Feldspar | Beryl, Cassiterite, Feldspar, Mica | Past Producer | 43.888, -103.381 |
| General Harney | Tin | Beryl, Cassiterite, Mica | Past Producer | 43.938, -103.586 |
| Buster Dike | Beryllium, Feldspar, Mica | Beryl, Cleavelandite, Muscovite | Past Producer | 43.733, -103.617 |
| Lookout Mine | Beryllium, Niobium (Columbium), Feldspar | Beryl, Columbite, Feldspar, Mica | Past Producer | 43.634, -103.619 |
| Mayo Lode | Feldspar | Beryl, Columbite, Feldspar, Mica, Tantalite | Past Producer | 43.687, -103.608 |
| New York Mine | Feldspar, Mica | Beryl, Columbite, Feldspar, Muscovite, Tantalite | Producer | 43.702, -103.686 |
| Blue Bird Lode | Feldspar, Beryllium | Beryl, Feldspar | Past Producer | 43.656, -103.604 |
| White Elephant Mine | Feldspar, Beryllium | Beryl, Feldspar | Past Producer | 43.656, -103.583 |
| Maderposson | Feldspar, Beryllium | Beryl, Feldspar | Occurrence | 43.862, -103.370 |
| Chipmunk No. 25 Claim | Feldspar, Beryllium | Beryl, Feldspar | Past Producer | 43.702, -103.608 |
| Cat Lode | Feldspar, Beryllium | Beryl, Feldspar | Past Producer | 43.671, -103.532 |
| Pringle Mine | Feldspar, Beryllium | Beryl, Feldspar | Past Producer | 43.617, -103.586 |
| Beryl Feldspar Mine | Feldspar | Beryl, Feldspar | Past Producer | 43.854, -103.369 |
| Bet Lode | Feldspar, Beryllium | Beryl, Feldspar | Past Producer | 43.671, -103.544 |
| Pleasant Valley Mine | Feldspar | Beryl, Feldspar | Past Producer | 43.722, -103.681 |
| Lookout No. 5 Lode | Beryllium, Feldspar | Beryl, Feldspar | Past Producer | 43.679, -103.634 |
| Ferguson Lode Claim | Feldspar, Beryllium | Beryl, Feldspar | Past Producer | 43.876, -103.368 |
Back to Rockhounding in South Dakota.
How we built this page: we counted named sites in the USGS Mineral Resources Data System (MRDS) for this area, left out sand, gravel, crushed stone, clay pits and unnamed sites, grouped them by Census county, and linked every site to its USGS record. We did not visit these sites, and MRDS does not tell you who owns the land or whether collecting is allowed.
Source: USGS Mineral Resources Data System (MRDS). USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date. Each site links to its USGS record.
Updated