RockWoofSketch map
Woof’s favorite find
Rainbow Claims
We picked it because its USGS record mentions 2 gem or collectible minerals (Gold, Silver) and 2 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as prospect for Lead. Minerals mentioned: Gold, Silver. Approx. location 48.199, -109.651. 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 terms come from USGS MRDS records.
Mineral cards
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
2 sites
Gold
Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
No individual minerals are listed in these records.
Commodities
Niobium (Columbium) 1Aluminum 1Silver 1Lead 1Uranium 1Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Rocky Boy Stock | Niobium (Columbium) | — | Occurrence | 48.167, -109.701 |
| Nepheline Occurrences | Aluminum | — | Occurrence | 48.169, -109.696 |
| Rainbow Claims | Silver | — | Occurrence | 48.198, -109.650 |
| Rainbow Claims | Lead | — | Prospect | 48.199, -109.651 |
| Number One | Uranium | — | Prospect | 48.170, -109.713 |
Fossil collections
The Paleobiology Database lists 40 fossil collection records in Hill County. These are research records, not public dig sites.
Nearby counties
Chouteau County · Blaine County · Phillips County · Fergus County · Liberty County
Montana mineral guides
- Tourmaline in Montana
- Quartz in Montana
- Garnet in Montana
- Gold in Montana
- Mica in Montana
- Feldspar in Montana
Back to all Montana 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 USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date.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