RockWoofFound alongside
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
94 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
87 sites
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
87 sites
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
38 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
10 sites
Tourmaline
Mohs 7–7.5. Long striated crystals, often black (schorl) or green and pink (elbaite). Mindat
8 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Houghton County (47) · Ontonagon County (33) · Marquette County (6) · Keweenaw County (5) · Gogebic County (2) · Dickinson County (1)
Sites (first 60)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| White Pine Mine | Copper | Chalcocite, Copper, Silver | Past Producer | 46.744, -89.534 |
| Houghton Exploration | Copper | Copper | Prospect | 47.081, -88.590 |
| Globe Mine | Copper | Copper | Past Producer | 47.022, -88.683 |
| Wolverine Mine | Copper | Copper | Past Producer | 47.268, -88.411 |
| Naumkeag Mine | Copper | Copper | Past Producer | 47.112, -88.598 |
| New Arcadian Exploration | Copper | Copper | Prospect | 47.164, -88.512 |
| New Baltic Exploration | Copper | Copper | Prospect | 47.161, -88.491 |
| Old Colony Exploration | Copper | Copper | Prospect | 47.243, -88.396 |
| Oneco Exploration | Copper | Copper | Prospect | 47.186, -88.475 |
| Rhode Island Exploration | Copper | Copper | Prospect | 47.185, -88.521 |
| Saint Mary's Mine | Copper | Copper | Prospect | 47.167, -88.541 |
| Atlantic Mine | Copper | Copper | Past Producer | 47.100, -88.628 |
| Mayflower Old Colony Mine | Copper | Copper | Past Producer | 47.257, -88.395 |
| Centennial Mine | Copper | Copper | Past Producer | 47.256, -88.423 |
| Champion Mine | Copper | Copper | Past Producer | 47.037, -88.668 |
| Franklin Junior Mine | Copper | Copper | Past Producer | 47.180, -88.526 |
| Hancock Mine | Copper | Copper | Past Producer | 47.129, -88.590 |
| Isle Royale Mine | Copper | Copper | Past Producer | 47.098, -88.580 |
| Kearsarge Mine | Copper | Copper | Past Producer | 47.245, -88.433 |
| La Salle Mine | Copper | Copper | Past Producer | 47.213, -88.469 |
| Mohawk Mine | Copper | Copper | Past Producer | 47.305, -88.359 |
| North Kearsarge Mine | Copper | Copper | Past Producer | 47.272, -88.408 |
| Osceola Mine | Copper | Copper | Past Producer | 47.226, -88.463 |
| Seneca No. 1 Mine | Copper | Copper | Past Producer | 47.310, -88.353 |
| South Kearsarge Mine | Copper | Copper | Past Producer | 47.261, -88.418 |
| Superior Mine | Copper | Copper | Past Producer | 47.078, -88.599 |
| Tamarack Junior Mine | Copper | Copper | Past Producer | 47.259, -88.449 |
| Tamarack Mine | Copper | Copper | Past Producer | 47.259, -88.460 |
| Trimountain Mine | Copper | Copper | Past Producer | 47.052, -88.655 |
| Atlantic Section 16 Exploration | Copper | Copper | Prospect | 47.070, -88.619 |
| Osceola Amygdaloid | Copper | Copper | Past Producer | 47.225, -88.459 |
| Calumet and Hecla Conglomerate Lode | Copper | Copper | Past Producer | 47.246, -88.450 |
| Indiana Mine | Copper | Copper | Past Producer | 46.799, -88.997 |
| North Lake Mine | Copper | Copper | Past Producer | 46.785, -89.023 |
| Norwich Mine | Copper | Copper | Past Producer | 46.661, -89.386 |
| South Lake Mine | Copper | Copper | Past Producer | 46.776, -89.054 |
| Toltec Mine | Copper | Copper | Past Producer | 46.779, -89.043 |
| Victoria Mine (Cushin) | Copper | Copper | Past Producer | 46.700, -89.232 |
| Winona Mine | Copper | Copper | Past Producer | 46.875, -88.907 |
| Wyandot Mine | Copper | Copper | Past Producer | 46.891, -88.876 |
| Laurium Mine | Copper | Copper | Past Producer | 47.219, -88.462 |
| Ripley Exploration | Copper | Copper | Prospect | 47.129, -88.552 |
| Nassau Mine | Copper | Copper | Past Producer | 46.741, -89.145 |
| Lake Mine | Copper | Copper | Past Producer | 46.768, -89.037 |
| King Philip Mine | Copper | Copper | Past Producer | 46.871, -88.919 |
| Cherokee Mine | Copper | Copper | Past Producer | 46.843, -88.967 |
| Elm River Mine | Copper | Copper | Past Producer | 46.923, -88.830 |
| Shawmut Mine | Copper | Copper | Past Producer | 46.919, -88.852 |
| Algomah Mine | Copper | Copper | Past Producer | 46.761, -89.040 |
| Quincy Mine | Copper, Silver | Copper | Past Producer | 47.143, -88.570 |
| Lake Superior Mine | Copper | Copper | Past Producer | 46.739, -89.147 |
| Belt Mine (Piscatauqua) | Copper | Copper | Past Producer | 46.783, -89.067 |
| Old Mass Mine | Copper | Copper | Past Producer | 46.756, -89.113 |
| White Pine Extension Mine | Copper | Copper, Chalcocite | Past Producer | 46.744, -89.724 |
| Cleveland Mine | Copper | Copper, Chalcocite | Past Producer | 46.796, -89.573 |
| Collins Mine | Copper | Copper, Chalcocite | Past Producer | 46.793, -89.575 |
| Scranton Mine | Copper | Copper, Chalcocite | Past Producer | 46.814, -89.585 |
| Ontonagon Mine | Copper | Copper, Chalcocite | Past Producer | 46.808, -89.569 |
| Cuyahoga Mine | Copper | Copper, Chalcocite | Past Producer | 46.816, -89.699 |
| Nonesuch Mine | Copper | Copper, Chalcocite | Past Producer | 46.754, -89.619 |
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