RockWoofSketch map
Woof’s favorite find
Beadle Mine
We picked it because its USGS record mentions 1 gem or collectible mineral (Quartz) and 3 of our card minerals overall. That ties with 6 other site(s), so we broke the tie by mine status (past producers first), then USGS record quality, then name. USGS lists it as unknown for Lead. Minerals mentioned: Quartz, Pyrite, Galena. Approx. location 42.469, -90.727. 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?
Produced ore or material at some point in the past.
Status not recorded.
The mineral was noted here, without development.
Status terms come from USGS MRDS records.
Mineral cards
Galena
Mohs 2.5–2.75. Heavy, silvery lead ore that breaks into cubes. Mindat
19 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
11 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
11 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Galena 19Sphalerite 10Limonite 1Smithsonite 1Commodities
Lead 21Zinc 12Phosphorus-Phosphates 12Iron 1Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Prospect | Lead | Galena | Occurrence | 42.304, -90.810 |
| Stewarts Cave Mine | Lead | Galena | Past Producer | 42.524, -90.701 |
| Kilbourne Mine | Lead | Galena | Unknown | 42.506, -90.696 |
| Levens Mine | Lead | Galena | Unknown | 42.513, -90.717 |
| Stewarts Cave Mine | Lead | Galena | Unknown | 42.525, -90.703 |
| Brugh and Amsden Mine | Lead | Galena | Unknown | 42.474, -90.727 |
| Beadle Mine | Lead | Galena | Unknown | 42.469, -90.727 |
| Level Mine | Lead | Galena | Unknown | 42.509, -90.708 |
| Kilbourne Mine | Lead | Galena | Past Producer | 42.507, -90.693 |
| Level Mine | Lead | Galena | Past Producer | 42.509, -90.705 |
| Stewart and Bartlett Mine | Lead | Galena | Past Producer | 42.525, -90.705 |
| Stewart and Bartlett Mine | Lead | Galena | Unknown | 42.525, -90.708 |
| Bonson Mine | Zinc, Lead, Iron | Galena, Limonite, Sphalerite | Past Producer | 42.551, -90.769 |
| Durango Drybone Mine Ewing Diggings | Lead, Zinc | Galena, Smithsonite | Past Producer | 42.557, -90.783 |
| Brugh and Amsden Mine | Zinc, Lead | Galena, Sphalerite | Past Producer | 42.475, -90.721 |
| Levens Mine North Langworthy Mine | Lead, Zinc | Galena, Sphalerite | Past Producer | 42.513, -90.713 |
| Fourteenth Street Mine | Lead, Zinc | Galena, Sphalerite | Past Producer | 42.496, -90.682 |
| Fitzpatrick Mine | Lead, Zinc | Galena, Sphalerite | Past Producer | 42.641, -90.930 |
| Beadle Mine, Dubuque and L Superior Mine | Lead, Zinc | Galena, Sphalerite | Past Producer | 42.470, -90.722 |
| Bonson Mine | Zinc | Sphalerite | Unknown | 42.551, -90.771 |
| Fourteenth Street Mine | Zinc | Sphalerite | Unknown | 42.493, -90.686 |
| Fitzpatrick Mine | Zinc | Sphalerite | Unknown | 42.639, -90.929 |
| Durango Drybone Mine | Zinc | Sphalerite | Unknown | 42.555, -90.786 |
| Twin Springs Quarry | Phosphorus-Phosphates | — | Past Producer | 42.520, -90.850 |
| Roadcut | Phosphorus-Phosphates | — | Past Producer | 42.508, -90.860 |
| Creek Bank | Phosphorus-Phosphates | — | Past Producer | 42.527, -90.737 |
| Creek Bank | Phosphorus-Phosphates | — | Past Producer | 42.485, -90.767 |
| Roadcut | Phosphorus-Phosphates | — | Past Producer | 42.498, -90.720 |
| Occurrence | Phosphorus-Phosphates | — | Past Producer | 42.493, -90.699 |
| Creek Bank | Phosphorus-Phosphates | — | Past Producer | 42.457, -90.722 |
| Occurrence | Phosphorus-Phosphates | — | Past Producer | 42.419, -90.740 |
| Excavation | Phosphorus-Phosphates | — | Past Producer | 42.430, -90.605 |
| Roadcut | Phosphorus-Phosphates | — | Past Producer | 42.494, -90.872 |
| Composite Section | Phosphorus-Phosphates | — | Past Producer | 42.492, -90.717 |
| Stream Bank | Phosphorus-Phosphates | — | Past Producer | 42.436, -90.676 |
| Sherrills Mound Mines | Lead | — | Past Producer | 42.608, -90.825 |
| Fitzpatrick Mine | Zinc, Lead | — | Past Producer | 42.642, -90.932 |
Fossil collections
The Paleobiology Database lists 3 fossil collection records in Dubuque County. These are research records, not public dig sites.
Nearby counties
Jackson County · Delaware County · Clayton County · Jones County · Clinton County
Iowa mineral guides
Back to all Iowa 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