RockWoofFound alongside
Gold
Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat
18 sites
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
7 sites
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
6 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
3 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
2 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Grafton County (8) · Coos County (5) · Carroll County (3) · Merrimack County (1) · Sullivan County (1)
Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Milan Mine | Copper | Chalcopyrite, Galena, Sphalerite, Pyrite, Bornite, Chalcocite | Past Producer | 44.565, -71.254 |
| Atwood Au Mine | Gold | — | Past Producer | 44.212, -71.880 |
| Lebanon I89 Roadcut Cu/Moly Showings | Sulfur-Pyrite, Copper, Molybdenum, Lead | — | Occurrence | 43.636, -72.284 |
| Reservoir Hill Mine | Lead, Silver | — | Past Producer | 43.643, -72.239 |
| Indian Stream Placers | Gold | — | Past Producer | 45.258, -71.305 |
| White Diamond Gold Mine | Gold | — | Past Producer | 43.819, -71.474 |
| Haviland Mine | Copper | — | Past Producer | 44.239, -72.000 |
| Trevina Hill & Dodge Mine/New England Mines | Gold | — | Past Producer | 44.236, -71.922 |
| Ney Prospect | Copper | — | Past Producer | 43.419, -71.803 |
| Milan Mine | — | — | Past Producer | 44.567, -71.249 |
| Indian Stream Placers | Gold | — | Occurrence | 45.270, -71.296 |
| Lamb Mine | Silver, Gold, Mica | — | Prospect | 43.518, -72.009 |
| Dalton Mine | Gold | — | Past Producer | 44.377, -71.729 |
| White Diamond Mine | Gold | — | Past Producer | 43.821, -71.466 |
| Pocket Mountain Prospect | Gold | — | Occurrence | 43.688, -71.051 |
| Prospect Hill Mine | Silver, Gold, Copper | — | Past Producer | 43.807, -72.238 |
| White Mountain Gold Mine | Gold | — | Past Producer | 44.226, -71.994 |
| Roy Farm Mine | Gold | — | Prospect | 44.219, -72.011 |
Back to Rockhounding in New Hampshire.
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