RockWoofSketch map
Woof’s favorite find
Corson Mine
We picked it because its USGS record mentions 1 gem or collectible mineral (Beryl) and 1 of our card minerals overall. That ties with 2 other site(s), so we broke the tie by mine status (past producers first), then USGS record quality, then name. USGS lists it as past producer for Beryllium. Minerals mentioned: Beryl. Approx. location 43.078, -71.116. 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?
The mineral was noted here, without development.
Explored or test-dug, with no recorded production.
Produced ore or material at some point in the past.
Was producing when the record was made.
Status terms come from USGS MRDS records.
Mineral cards
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
95 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
74 sites
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
2 sites
Beryl
Mohs 7.5–8. Six-sided crystals; aquamarine and emerald are beryl. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Columbite 5Tantalite 5Beryl 1Commodities
Feldspar 93Silica 7Niobium (Columbium) 5Tantalum 5Lead 2Beryllium 2Mica 2Tungsten 1Silver 1Sites (first 40)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Corson Mine | Beryllium | Beryl | Past Producer | 43.078, -71.116 |
| Smith Mine | Niobium (Columbium), Tantalum, Feldspar | Columbite, Tantalite | Occurrence | 43.000, -70.999 |
| Welch Mine | Tantalum, Feldspar, Niobium (Columbium) | Columbite, Tantalite | Occurrence | 43.000, -71.216 |
| Blake Mine | Niobium (Columbium), Tantalum, Feldspar | Columbite, Tantalite | Occurrence | 43.000, -71.216 |
| Corson Mine | Niobium (Columbium), Tantalum, Feldspar | Columbite, Tantalite | Occurrence | 43.083, -71.116 |
| Chandler Mine | Tantalum, Feldspar, Niobium (Columbium) | Columbite, Tantalite | Occurrence | 43.000, -71.216 |
| New Market Ag Mine | Lead | — | Past Producer | 43.083, -70.937 |
| Welch Mine | Feldspar | — | Past Producer | 43.001, -71.234 |
| Pegmatite No. 19 | Feldspar | — | Occurrence | 43.007, -71.221 |
| Pegmatite No. 81 | Feldspar | — | Occurrence | 43.000, -71.235 |
| Pegmatite No. 13 | Feldspar | — | Occurrence | 43.009, -71.223 |
| Pegmatite No. 63 | Feldspar | — | Occurrence | 43.001, -71.234 |
| Pegmatite No. 35 | Feldspar | — | Occurrence | 43.004, -71.226 |
| Pegmatite No. 18 | Feldspar | — | Occurrence | 43.007, -71.220 |
| Pegmatite No. 53 | Feldspar | — | Occurrence | 43.009, -71.240 |
| Pegmatite No. 60 | Feldspar | — | Occurrence | 42.999, -71.232 |
| Mcmullen Prospect | Feldspar | — | Past Producer | 43.019, -71.189 |
| Pegmatite No. 6 | Mica | — | Occurrence | 43.011, -71.228 |
| Pegmatite No. 32 | Feldspar | — | Occurrence | 43.004, -71.226 |
| Mcgall Mine | Feldspar | — | Past Producer | 43.022, -71.180 |
| Pegmatite No. 80 | Feldspar | — | Occurrence | 42.999, -71.237 |
| Mills Prospect | Feldspar | — | Prospect | 43.001, -71.228 |
| Pegmatite No. 42 | Feldspar | — | Occurrence | 43.004, -71.231 |
| United Tech./ Newmarket, Nh. | Mica | — | Producer | 43.080, -70.938 |
| Haverhill Road Foundry Sand | Silica | — | Prospect | 42.964, -70.955 |
| Newmarket Mine | Lead | — | Past Producer | 43.071, -70.957 |
| Pegmatite No. 86 | Feldspar | — | Prospect | 42.996, -71.249 |
| Epping Foundry Sand Prospect | Silica | — | Prospect | 43.040, -71.060 |
| Pegmatite No. 25 | Feldspar | — | Prospect | 43.005, -71.227 |
| Pegmatite No. 28 | Feldspar | — | Prospect | 43.004, -71.224 |
| Pegmatite No. 47 | Feldspar | — | Occurrence | 43.003, -71.235 |
| Pegmatite No. 39 | Feldspar | — | Occurrence | 43.002, -71.224 |
| Pegmatite No. 58 | Feldspar | — | Occurrence | 43.001, -71.237 |
| Pegmatite No. 22 | Feldspar | — | Occurrence | 43.006, -71.224 |
| Pegmatite No. 66 | Feldspar | — | Occurrence | 43.002, -71.229 |
| Pegmatite No. 16 | Feldspar | — | Occurrence | 43.008, -71.222 |
| Vatcher Prospect | Feldspar | — | Prospect | 43.059, -71.146 |
| Pegmatite No. 84 | Feldspar | — | Prospect | 42.996, -71.248 |
| Flint Hill Quartz | Silica | — | Prospect | 43.051, -71.161 |
| Pegmatite No. 61 | Feldspar | — | Occurrence | 42.999, -71.233 |
Fossil collections
The Paleobiology Database lists 1 fossil collection records in Rockingham County. These are research records, not public dig sites.
Nearby counties
Strafford County · Hillsborough County · Merrimack County · Belknap 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