RockWoofFound alongside
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
77 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
37 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
23 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
21 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
14 sites
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
11 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Essex County (20) · Saratoga County (17) · St. Lawrence County (12) · Warren County (9) · Washington County (8) · Putnam County (3) · Westchester County (2) · Fulton County (2) · Jefferson County (1) · Clinton County (1) · Hamilton County (1) · Lewis County (1)
Sites (first 60)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Crown Point Spar Mine | Feldspar | Biotite, Feldspar | Past Producer | 43.924, -73.438 |
| Unnamed Occurrence | Garnet | Biotite, Feldspar, Garnet, Quartz | Occurrence | 43.738, -73.981 |
| Corinth Feldspar Co. Quarry | Feldspar | Biotite, Feldspar, Garnet, Quartz | Occurrence | 43.237, -73.871 |
| American Mine | Graphite | Biotite, Feldspar, Graphite, Pyrite | Past Producer | 43.751, -73.573 |
| The Bly Property Mine | Graphite | Biotite, Feldspar, Graphite, Pyrite, Quartz | Occurrence | 43.862, -73.586 |
| Chestertown Occurrence | Mica | Biotite, Feldspar, Muscovite, Quartz | Past Producer | 43.615, -73.780 |
| Roe Mine | Feldspar | Biotite, Feldspar, Pyrite | Past Producer | 43.982, -73.540 |
| Croton - Theall Magnetite Mine | Iron | Chalcopyrite, Magnetite, Pyrite | Past Producer | 41.368, -73.651 |
| Croton-Mc Collum Magnetite Mine | Iron | Chalcopyrite, Magnetite, Pyrite | Past Producer | 41.365, -73.654 |
| Barrett Deposit | Feldspar | Feldspar | Past Producer | 43.863, -73.456 |
| Overlook Quarry | Feldspar | Feldspar | Occurrence | 43.295, -73.936 |
| Oven Mountain Mine | Garnet | Feldspar, Garnet, Pyrite | Past Producer | 43.646, -73.978 |
| Unnamed Occurrence | Granite | Feldspar, Granite, Quartz | Occurrence | 43.677, -73.750 |
| International Graphite Co. Property | Graphite | Feldspar, Graphite, Mica, Pyrite, Quartz | Past Producer | 43.757, -73.877 |
| Hooper Brothers Mine | Graphite | Feldspar, Graphite, Pyrite, Quartz | Past Producer | 43.562, -73.487 |
| Lakeside Mine | Graphite | Feldspar, Graphite, Pyrite, Quartz | Past Producer | 43.749, -73.497 |
| Faxon Property | Graphite | Feldspar, Graphite, Quartz | Past Producer | 43.742, -73.589 |
| Champlain Graphite Company Mine | Graphite | Feldspar, Graphite, Quartz | Past Producer | 43.546, -73.459 |
| Silver Leaf Co. Prospect | Graphite | Feldspar, Graphite, Quartz | Occurrence | 43.546, -73.487 |
| Mount Hope Mine | Iron | Feldspar, Iron, Pyrite, Quartz | Past Producer | 43.467, -73.572 |
| Mt. Anthony Prospect | Feldspar, Iron | Feldspar, Magnetite | Past Producer | 43.297, -73.839 |
| Adirondack Mining and Milling Co Mine | Graphite | Feldspar, Mica | Past Producer | 43.553, -73.472 |
| Rose Rock Quarry | Feldspar | Feldspar, Mica, Pyrite | Past Producer | 43.920, -73.453 |
| Ashley Quarry | Quartz, Feldspar | Feldspar, Quartz | Past Producer | 43.437, -73.517 |
| Corinth Feldspar Co. | Feldspar | Feldspar, Quartz | Occurrence | 43.238, -73.888 |
| Benson Mine and Mill | Iron | Hematite, Magnetite | Past Producer | 44.179, -75.006 |
| Dalton Ore | Titanium, Metal, Iron | Ilmenite | Occurrence | 44.083, -73.616 |
| Sanford Hill Body | Iron, Titanium, Metal | Magnetite | Past Producer | 44.055, -74.049 |
| Clover Hill Magnetite Mine | Iron | Magnetite | Past Producer | 41.345, -73.680 |
| Cole Mine | Sulfur-Pyrite | Pyrite | Past Producer | 44.384, -75.396 |
| Farr Prospect | Sulfur-Pyrite, Iron, Pig Iron | Pyrite, Pyrrhotite | Occurrence | 44.448, -75.320 |
| Cheney Pond Ore Body | Titanium, Metal, Iron, Vanadium | — | Occurrence | 44.050, -74.083 |
| Upper Works Ore Body | Titanium, Metal | — | Producer | 44.100, -74.066 |
| Mt. Adams Ore Body | Iron, Vanadium, Titanium, Metal | — | Occurrence | 44.083, -74.050 |
| Sanford Hill-South Extension | Titanium, Metal, Iron | — | Past Producer | 44.050, -74.050 |
| Lincoln Pond Mine | Titanium, Metal, Iron, Vanadium | — | Occurrence | 44.133, -73.583 |
| Split Rock Mine | Titanium, Metal, Iron, Vanadium | — | Occurrence | 44.217, -73.366 |
| Styles Prospect | Sulfur-Pyrite | — | Occurrence | 44.440, -75.340 |
| De Kalb Deposit | Feldspar | — | Past Producer | 44.459, -75.311 |
| Brandy Brook Southeast Occurrence | Iron | — | Occurrence | 44.207, -74.790 |
| Pope Mills Deposit | Graphite | — | Past Producer | 44.470, -75.557 |
| Wight Prospect | Sulfur-Pyrite | — | Occurrence | 44.231, -75.595 |
| Dills and La Oake Mine | Iron | — | Past Producer | 44.511, -73.667 |
| Phillips Mine-Camp Smith Area | — | — | Past Producer | 41.324, -73.948 |
| Batchellerville Beryl Mine | Beryllium | — | Past Producer | 43.233, -74.050 |
| Hobby Quarries | Feldspar | — | Past Producer | 41.178, -73.618 |
| Batchellerville Biotite Pit | Feldspar | — | Past Producer | 43.239, -74.052 |
| Woodstock Prospect | Feldspar | — | Prospect | 43.237, -73.871 |
| Macintyre Development | Iron, Titanium | — | Past Producer | 44.051, -74.050 |
| Spar Bed Hill Quarry | Feldspar | — | Past Producer | 43.982, -73.540 |
| Overlook Quarry | Feldspar | — | Past Producer | 43.295, -75.936 |
| Mineville Dumps | REE | — | Past Producer | 44.067, -73.490 |
| Mineville Mines | Iron | — | Past Producer | 44.060, -73.460 |
| Corinth Feldspar Co.Prospect | Feldspar | — | Prospect | 43.238, -73.888 |
| Fine Deposit | Feldspar | — | Prospect | 44.244, -75.133 |
| Tyrell Quarry | Feldspar | — | Past Producer | 43.192, -74.246 |
| Barrett Manufacturing Co. Quarry | Feldspar | — | Past Producer | 43.863, -73.456 |
| L.V.Hurlburt Deposit | Feldspar | — | Past Producer | 44.187, -75.068 |
| Batchellerville Jasper Pit | Feldspar | — | Past Producer | 43.238, -74.053 |
| Batchellerville Tourmaline Pit | Feldspar | — | Past Producer | 43.240, -74.050 |
Back to Rockhounding in New York.
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