Sketch map
Woof’s favorite find
Beaufort Mine
We picked it because its USGS record mentions 1 gem or collectible mineral (Garnet) and 3 of our card minerals overall. That ties with 8 other site(s), so we broke the tie by mine status (past producers first), then USGS record quality, then name. USGS lists it as past producer for Iron. Minerals mentioned: Garnet, Mica, Magnetite. Approx. location 46.542, -88.179. 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.
Explored or test-dug, with no recorded production.
The mineral was noted here, without development.
Was producing when the record was made.
Status terms come from USGS MRDS records.
Mineral cards
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
10 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
9 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
9 sites
Gold
Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat
4 sites
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
4 sites
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Limonite 9Grunerite 9Hematite 6Gold 3Graphite 2Siderite 1Slate 1Silver 1Vanadiferous Magnetite 1Commodities
Iron 11Vanadium 5Graphite 5Silver 4Gold 4Lead 3Granite 3Zinc 2Uranium 1Slate 1Sites (first 40)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Hancock Exploration | Gold | Gold | Prospect | 46.476, -88.192 |
| Marquette Exploration | Gold | Gold | Prospect | 46.748, -88.046 |
| Grummett (Ned Lake) Exploration | Gold | Gold | Prospect | 46.454, -88.336 |
| Detroit Graphite Co. Graphite Quarry | Graphite | Graphite | Producer | 46.635, -88.347 |
| Northern Graphite Works Quarry | Graphite | Graphite | Producer | 46.647, -88.446 |
| 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 |
| Taylor Mine | Iron | Hematite, Limonite | Past Producer | 46.664, -88.442 |
| Imperial Mine (Wetmore) | Iron | Hematite, Limonite, Grunerite | Past Producer | 46.531, -88.133 |
| Norwood Mine | Iron | Limonite, Grunerite | Past Producer | 46.538, -88.171 |
| Titan Mine | Iron | Limonite, Grunerite | Past Producer | 46.543, -88.183 |
| Webster Mine | Iron | Limonite, Grunerite | Past Producer | 46.532, -88.141 |
| Beaufort Mine | Iron | Limonite, Grunerite | Past Producer | 46.542, -88.179 |
| Silver River Silver Prospect | Silver | Silver | Prospect | 46.758, -88.357 |
| Huron Bay Slate Co | Slate, Dimension | Slate | Past Producer | 46.776, -88.246 |
| Bughole Exploration | Vanadium | Vanadiferous Magnetite | Prospect | 46.683, -88.010 |
| Skanee Area | Lead, Vanadium, Zinc | — | Occurrence | 46.833, -88.250 |
| Gomanche Creek Slate Quarry | Granite | — | Past Producer | 46.763, -88.352 |
| Northern Graphite Works Quarry | Graphite | — | Past Producer | 46.647, -88.446 |
| Imperial Mine | — | — | Past Producer | 46.531, -88.132 |
| Ohio Mine -Includes Norwood Mine | — | — | Past Producer | 46.538, -88.171 |
| Unnamed Silver Prospect | Silver | — | Prospect | 46.758, -88.417 |
| Portland Open Pit | — | — | Past Producer | 46.534, -88.153 |
| Unnamed Vanadium Prospect | Vanadium | — | Occurrence | 46.854, -88.061 |
| Imperial Iron Mine | Iron | — | Past Producer | 46.531, -88.133 |
| Unnamed Lead Zinc Uranium Prospect | Lead, Zinc, Uranium | — | Occurrence | 46.854, -88.056 |
| Spurr Mine | — | — | Past Producer | 46.542, -88.131 |
| Webster Mine | — | — | Past Producer | 46.533, -88.147 |
| Unnamed Gold Prospect | Gold | — | Prospect | 46.747, -88.054 |
| Unnamed Lead Prospect | Lead | — | Occurrence | 46.861, -88.083 |
| Titan Mine | — | — | Past Producer | 46.541, -88.183 |
| Taylor Mine | — | — | Past Producer | 46.663, -88.441 |
| Detroit Graphite Co.Graphite Quarry | Graphite | — | Past Producer | 46.635, -88.347 |
| N.East Branch Slate Quarry | Granite | — | Past Producer | 46.732, -88.309 |
| Beaufort Mine | — | — | Past Producer | 46.541, -88.178 |
| Unnamed Silver Prospect | Silver | — | Prospect | 46.836, -88.090 |
| Sidnaw Slate Quarry | Granite | — | Past Producer | 46.557, -88.521 |
| Steward | — | — | Prospect | 46.541, -88.142 |
Nearby counties
Marquette County · Iron County · Houghton County · Kent County · Dickinson County
Michigan mineral guides
- Tourmaline in Michigan
- Quartz in Michigan
- Garnet in Michigan
- Gold in Michigan
- Mica in Michigan
- Feldspar in Michigan
Back to all Michigan 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