RockWoofSketch map
Woof’s favorite find
Prospect Hill Mine
We picked it because its USGS record mentions 2 gem or collectible minerals (Gold, Silver) and 3 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as past producer for Silver, Gold, Copper. Minerals mentioned: Gold, Copper, Silver. Approx. location 43.807, -72.238. 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?
Explored or test-dug, with no recorded production.
Produced ore or material at some point in the past.
The mineral was noted here, without development.
Was producing when the record was made.
Status not recorded.
Status terms come from USGS MRDS records.
Mineral cards
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
117 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
98 sites
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
30 sites
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
12 sites
Gold
Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat
8 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
7 sites
Beryl
Mohs 7.5–8. Six-sided crystals; aquamarine and emerald are beryl. Mindat
3 sites
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
2 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Beryl 3Scheelite 2Magnetite 2Mica 1Wolframite 1Muscovite 1Commodities
Mica 98Feldspar 27Copper 24Lead 17Beryllium 12Gold 8Silver 6Silica 6Tungsten 5Molybdenum 5Sites (first 40)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Evans & Alger | Beryllium | Beryl | Past Producer | 43.590, -71.999 |
| Palermo1 | Beryllium | Beryl | Past Producer | 43.756, -71.874 |
| Pattuck Mica Mine | Feldspar, Niobium (Columbium), Tantalum, Mica, Beryllium | Beryl, Muscovite | Producer | 43.633, -71.833 |
| Ore Hill, Franconia Iron Mine | Iron | Magnetite | Past Producer | 44.194, -71.784 |
| Piermont Mine | Iron | Magnetite | Past Producer | 44.000, -72.004 |
| North Groton | Mica | Mica, Wolframite | Past Producer | 43.750, -71.849 |
| Post Hill Scheelite Showing | Tungsten | Scheelite | Occurrence | 43.829, -72.162 |
| Winslow Ledge Scheelite Showing | Tungsten | Scheelite | Occurrence | 43.779, -72.087 |
| Old Copper Mine | Copper | — | Past Producer | 43.678, -72.179 |
| Atwood Au Mine | Gold | — | Past Producer | 44.212, -71.880 |
| Holts Ledge Scheelite | Tungsten | — | Past Producer | 43.780, -72.099 |
| 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 |
| Farnum Hill Copper Prospect | Copper, Iron, Pig Iron | — | Occurrence | 43.620, -72.272 |
| Old Mine | Lead | — | Past Producer | 43.628, -71.699 |
| Old Mine | Lead | — | Past Producer | 43.615, -71.748 |
| Old Lead Mine | Lead | — | Past Producer | 43.875, -71.763 |
| Rumney Or Merrill Mine | Lead | — | Past Producer | 43.805, -71.813 |
| Ore Hill Mine Warren Mine | Lead | — | Past Producer | 43.942, -71.933 |
| Pattuck Mine/E.E. Smith | Beryllium | — | Past Producer | 43.622, -71.837 |
| Gardner Mt. Mine/Gregory Mine/Quint Mine | Copper | — | Past Producer | 44.315, -71.927 |
| Granite State Paddock Mine | Copper | — | Past Producer | 44.279, -71.963 |
| Forsyth Mine | Copper | — | Past Producer | 44.231, -71.988 |
| Stevens Mine/Lang Mine | Copper | — | Past Producer | 44.221, -72.002 |
| Paddock Lead Mine | Lead | — | Past Producer | 44.247, -72.013 |
| Haviland Mine | Copper | — | Past Producer | 44.239, -72.000 |
| King Mine | Copper | — | Past Producer | 43.697, -72.186 |
| Holt's Ledge Scheelite Mine | Tungsten | — | Past Producer | 43.775, -72.108 |
| Franham Hill Cu Prospect | Copper | — | Occurrence | 43.618, -72.268 |
| Trevina Hill & Dodge Mine/New England Mines | Gold | — | Past Producer | 44.236, -71.922 |
| Cleaveland Mine? | Copper | — | Past Producer | 43.661, -72.151 |
| Ore Hill | Zinc, Lead, Copper | — | Past Producer | 43.937, -71.948 |
| Clement Prospect | Mica | — | Prospect | 43.917, -71.893 |
| Nancy No. 1 Mica Mine | Mica | — | Past Producer | 43.768, -72.874 |
| Mt. Cube Quartzite | Silica | — | Prospect | 43.884, -72.026 |
| Bailey Hill Prospect | Beryllium, Feldspar | — | Prospect | 43.787, -71.886 |
| Sugar Hill Mine | Iron | — | Past Producer | 44.196, -71.790 |
| Pinnacle Prospects | Beryllium, Mica, Feldspar | — | Prospect | 43.677, -71.959 |
| Carter Farm Mica Prospect | Mica | — | Prospect | 43.798, -71.943 |
| Pegmatite No. 19 | Mica | — | Occurrence | 43.736, -71.911 |
Nearby counties
Belknap County · Sullivan County · Merrimack County · Carroll County · Cheshire 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