RockWoofSketch map
Woof’s favorite find
Negro Hill placers
We picked it because its USGS record mentions 4 gem or collectible minerals (Tourmaline, Quartz, Garnet, Gold) and 4 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as occurrence for Gold, Tin, Tungsten, Garnet. Minerals mentioned: Tourmaline, Quartz, Garnet, Gold. Approx. location 44.367, -104.067. USGS record.
Ask first: a USGS record doesn’t mean you can visit. Find out who owns the land and get permission before collecting.
Field cards: what kind of sites?
The mineral was noted here, without development.
Explored or test-dug, with no recorded production.
Status not recorded.
Produced ore or material at some point in the past.
Was producing when the record was made.
Status terms come from USGS MRDS records.
Mineral cards
Fluorite
Mohs 4. Cubes in purple, green or yellow; many glow under UV. Mindat
10 sites
Gold
Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat
6 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
2 sites
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
2 sites
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
2 sites
Tourmaline
Mohs 7–7.5. Long striated crystals, often black (schorl) or green and pink (elbaite). Mindat
1 site
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
1 site
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Carnotite 5Uraninite 5Tyuyamunite 3Coffinite 3Gold 3Cassiterite 2Fluorite 1Wolframite 1Torbernite 1Commodities
Uranium 80Bentonite 17Fluorine-Fluorite 6Gold 6Tin 3Copper 2Silver 2Tungsten 1Garnet 1REE 1Sites (first 40)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Jubilee Mine | Uranium | Carnotite | Unknown | 44.661, -104.766 |
| Busfield Mine | Uranium | Carnotite, Coffinite, Uraninite, Tyuyamunite | Past Producer | 44.806, -104.743 |
| Aladdin | Uranium | Carnotite, Torbernite | Producer | 44.685, -104.099 |
| Carlile Mine | Uranium | Carnotite, Tyuyamunite | Past Producer | 44.465, -104.751 |
| Thorn Ridge Mine | Uranium | Carnotite, Tyuyamunite | Occurrence | 44.477, -104.729 |
| Sand Creek | Tin | Cassiterite | Occurrence | 44.364, -104.065 |
| Negro Hill placers | Gold, Tin, Tungsten, Garnet | Cassiterite, Gold, Wolframite | Occurrence | 44.367, -104.067 |
| New Haven 28 | Uranium | Coffinite, Uraninite | Occurrence | 44.852, -104.887 |
| Hauber Mine | Uranium | Coffinite, Uraninite | Past Producer | 44.782, -104.887 |
| Peterson Claims, Bear Lodge Mtns | Fluorine-Fluorite | Fluorite | Occurrence | 44.483, -104.334 |
| Unidentified Gold Occurrence | Gold | Gold | Occurrence | 44.488, -104.459 |
| Warren Peaks Occurrence | Gold | Gold | Occurrence | 44.479, -104.456 |
| Vickers Mine (Kay) | Uranium | Uraninite | Past Producer | 44.813, -104.748 |
| Laymon Lease | Uranium | Uraninite | Past Producer | 44.466, -104.769 |
| Apex | Uranium | — | Occurrence | 44.437, -104.102 |
| Thorn Divide | Uranium | — | Occurrence | 44.462, -104.772 |
| Cabin Creek 4 and 7 | Uranium | — | Occurrence | 44.495, -104.893 |
| Helmer (Sec. 19) | Uranium | — | Occurrence | 44.656, -104.091 |
| Nelson Property | Uranium | — | Occurrence | 44.641, -104.083 |
| Richards Property | Uranium | — | Occurrence | 44.655, -104.204 |
| Poison Creek | Uranium | — | Occurrence | 44.681, -104.847 |
| New Haven | Uranium | — | Occurrence | 44.782, -104.887 |
| Cochrun | Uranium | — | Occurrence | 44.886, -104.447 |
| Virgina 16 | Uranium | — | Past Producer | 44.884, -104.573 |
| New Haven Homestake | Uranium | — | Occurrence | 44.773, -104.881 |
| Bear Lodge Mountains area | Gold, REE, Niobium (Columbium) | — | Prospect | 44.491, -104.443 |
| Viergutz Prospects | Uranium | — | Occurrence | 44.711, -104.264 |
| Saddle Group | Uranium | — | Prospect | 44.739, -104.646 |
| Middle Creek #2 | Bentonite | — | Producer | 44.789, -104.081 |
| Baroid Colony Mine | Bentonite | — | Producer | 44.932, -104.211 |
| Tony 1 | Uranium | — | Past Producer | 44.474, -104.698 |
| South of Colony | Bentonite | — | Producer | 44.887, -104.194 |
| Jones, Bury, & Murdock Property #1 | Uranium | — | Occurrence | 44.393, -104.143 |
| State Lease 22090 | Uranium | — | Past Producer | 44.667, -104.076 |
| Helmer | Uranium | — | Unknown | 44.679, -104.093 |
| Oak Creek | Uranium | — | Occurrence | 44.717, -104.264 |
| Sand Lode 4 | Uranium | — | Prospect | 44.507, -104.870 |
| Belle Fourche River No 1 | Bentonite | — | Unknown | 44.845, -104.224 |
| Campstool 9 and 11 | Uranium | — | Occurrence | 44.549, -104.746 |
| Federal Colony Mill | Bentonite | — | Producer | 44.926, -104.200 |
Fossil collections
The Paleobiology Database lists 39 fossil collection records in Crook County. These are research records, not public dig sites.
Nearby counties
Weston County · Campbell County · Niobrara County · Converse County · Johnson County
Wyoming mineral guides
- Tourmaline in Wyoming
- Quartz in Wyoming
- Garnet in Wyoming
- Gold in Wyoming
- Mica in Wyoming
- Feldspar in Wyoming
Back to all Wyoming counties.
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