RockWoofSketch map
Woof’s favorite find
Milan Mine
We picked it because its USGS record mentions 3 gem or collectible minerals (Quartz, Gold, Silver) and 8 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as past producer for Copper. Minerals mentioned: Quartz, Gold, Mica, Feldspar, Pyrite, Galena, Copper, Silver. Approx. location 44.565, -71.254. 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.
Status not recorded.
The mineral was noted here, without development.
Was producing when the record was made.
Status terms come from USGS MRDS records.
Mineral cards
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
9 sites
Gold
Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat
5 sites
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
5 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
2 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
2 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
2 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
1 site
Galena
Mohs 2.5–2.75. Heavy, silvery lead ore that breaks into cubes. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Chalcopyrite 1Galena 1Sphalerite 1Pyrite 1Bornite 1Chalcocite 1Commodities
Copper 5Gold 3Lead 3Zinc 2Sulfur 2Molybdenum 1Mica 1Granite 1Silver 1Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Milan Mine | Copper | Chalcopyrite, Galena, Sphalerite, Pyrite, Bornite, Chalcocite | Past Producer | 44.565, -71.254 |
| Indian Stream Placers | Gold | — | Past Producer | 45.258, -71.305 |
| Nay Mine | Copper | — | Past Producer | 44.569, -71.297 |
| Shelburne Pb Mine | Lead | — | Past Producer | 44.419, -71.130 |
| Dalton Au Mine | Copper | — | Past Producer | 44.369, -71.719 |
| Moscot Pb Mine | Lead, Zinc | — | Past Producer | 44.400, -71.177 |
| Nay Mine | — | — | Unknown | 44.439, -71.225 |
| Milan Mine | — | — | Past Producer | 44.567, -71.249 |
| Indian Stream Placers | Gold | — | Occurrence | 45.270, -71.296 |
| Mascot Lead Zinc Mine | — | — | Past Producer | 44.401, -71.178 |
| Dalton Mine | Gold | — | Past Producer | 44.377, -71.729 |
| Copperville Mine | Copper | — | Unknown | 44.536, -71.239 |
| Crane Mine | Molybdenum | — | Prospect | 44.366, -71.615 |
| Fischer Mica Prospect | Mica | — | Prospect | 44.391, -71.069 |
| Old Howard Copper Prospect | Sulfur | — | Prospect | 44.514, -71.168 |
| Gumb Quarry | Granite | — | Producer | 44.921, -71.183 |
| Boutwell-Page Hill Prospect | Copper | — | Prospect | 44.517, -71.533 |
| Shelburne Mine | — | — | Past Producer | 44.419, -71.130 |
| Joseph Gange Prospect | Sulfur | — | Occurrence | 44.501, -71.184 |
| Stevens Prospect | — | — | Unknown | 44.401, -71.146 |
Nearby counties
Carroll County · Grafton County · Belknap County · Strafford County · Merrimack County
New Hampshire mineral guides
- Beryl in New Hampshire
- Gold in New Hampshire
- Mica in New Hampshire
- Feldspar in New Hampshire
- Pyrite in New Hampshire
- Fluorite in New Hampshire
Back to all New Hampshire 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