RockWoofFound alongside
Tourmaline
Mohs 7–7.5. Long striated crystals, often black (schorl) or green and pink (elbaite). Mindat
11 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
11 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
8 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
8 sites
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
7 sites
Gold
Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat
3 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Ontonagon County (7) · Marquette County (4)
Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| White Pine Mine | Copper | Chalcocite, Copper, Silver | Past Producer | 46.744, -89.534 |
| Nonesuch Mine | Copper | Copper, Chalcocite | Past Producer | 46.754, -89.619 |
| Ontonagon Mine | Copper | Copper, Chalcocite | Past Producer | 46.808, -89.569 |
| Scranton Mine | Copper | Copper, Chalcocite | Past Producer | 46.814, -89.585 |
| White Pine Extension Mine | Copper | Copper, Chalcocite | Past Producer | 46.744, -89.724 |
| Collins Mine | Copper | Copper, Chalcocite | Past Producer | 46.793, -89.575 |
| Cleveland Mine | Copper | Copper, Chalcocite | Past Producer | 46.796, -89.573 |
| High Point Gold Prospect | Gold | Gold | Prospect | 46.632, -87.776 |
| Michigan Gold Mine | Gold | Gold | Producer | 46.517, -87.768 |
| Gold Bluff Prospect | Gold | Gold | Prospect | 46.610, -87.681 |
| Empire | Iron | — | Producer | 46.444, -87.597 |
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 USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date.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