RockWoofFound alongside
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
15 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
14 sites
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
11 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
5 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Baraga County (9) · Marquette County (5) · Dickinson County (1)
Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Michigamme Mine | Iron | Hematite | Past Producer | 46.539, -88.099 |
| Portland Mine | Iron | Hematite, Grunerite, Limonite | Past Producer | 46.535, -88.152 |
| Ohio Mine | Iron | Hematite, Grunerite, Limonite | Past Producer | 46.537, -88.162 |
| Steward Mine (Orleans) | Iron | Hematite, Grunerite, Limonite | Past Producer | 46.536, -88.157 |
| Spurr Mine | Iron | Hematite, Grunerite, Siderite | Past Producer | 46.541, -88.133 |
| Imperial Mine (Wetmore) | Iron | Hematite, Limonite, Grunerite | Past Producer | 46.531, -88.133 |
| Webster Mine | Iron | Limonite, Grunerite | Past Producer | 46.532, -88.141 |
| Titan Mine | Iron | Limonite, Grunerite | Past Producer | 46.543, -88.183 |
| Norwood Mine | Iron | Limonite, Grunerite | Past Producer | 46.538, -88.171 |
| Beaufort Mine | Iron | Limonite, Grunerite | Past Producer | 46.542, -88.179 |
| Groveland Mine | Iron, Manganese | Magnetite, Hematite | Past Producer | 45.992, -87.981 |
| North Republic Mine | Iron | — | Past Producer | 46.413, -88.014 |
| Riverside Mine | Iron | — | Past Producer | 46.434, -88.025 |
| Erie Mine | Iron | — | Past Producer | 46.447, -88.066 |
| Magnetic Mine | Iron | — | Past Producer | 46.456, -88.096 |
Back to Rockhounding in Michigan.
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 USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date.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