RockWoofCheck access before you go. Most sites listed here are old mines, quarries or prospects, and many are on private land or active mining claims. Get the landowner's permission, check the rules of the agency that manages any public land, and never enter mine workings. Locations are approximate.
Found alongside
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
106 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
52 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
27 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
23 sites
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
18 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
16 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
St. Lawrence County (34) · Essex County (18) · Putnam County (10) · Columbia County (8) · Warren County (8) · Jefferson County (8) · Washington County (6) · Westchester County (5) · Saratoga County (4) · Dutchess County (2) · Lewis County (2) · Montgomery County (1)
Sites (first 60)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| 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 |
| Roe Mine | Feldspar | Biotite, Feldspar, Pyrite | Past Producer | 43.982, -73.540 |
| Todd Magnetite Mine | Iron | Calcite, Chlorite, Epidote, Hornblende, Magnetite, Pyrite, Pyrrhotite | Past Producer | 41.328, -73.917 |
| Mt. Tom Carbonate Iron Mine | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.166, -73.829 |
| Burden No. 3 Iron Carbonate Mine | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.163, -73.799 |
| Plass Hill Carbonate Iron Mine | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.207, -73.835 |
| Cedar Hill Iron Carbonate Openings | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.178, -73.833 |
| Livington's Iron Carbonate Mine | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.177, -73.832 |
| Burden No. 2 Carbonate Iron Mine | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.160, -73.825 |
| Sing Sing Silver Mine | Lead | Chalcocite, Chalcopyrite, Galena, Malachite, Silver | Past Producer | 41.141, -73.865 |
| Canaan Lead Silver Mines | Lead, Silver | Chalcocite, Chalcopyrite, Galena, Pyrite, Sphalerite | Producer | 42.386, -73.425 |
| Ancram Lead Mine | Lead, Silver | Chalcocite, Chalcopyrite, Galena, Pyrite, Sphalerite, Wulfenite | Producer | 42.021, -73.600 |
| Judge Bockee-Ward Bryant Lead Mine | Lead, Silver | Chalcocite, Galena, Malachite, Pyrite, Sphalerite | Past Producer | 41.905, -73.598 |
| 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 |
| Phillips Sulfide, Magnetite, and Uranium Mine | Iron, Sulfur | Chalcopyrite, Magnetite, Pyrite, Pyrrhotite, Uraninite | Past Producer | 41.326, -73.950 |
| Phillips Mine | Molybdenum, Uranium | Chalcopyrite, Molybdenite | Occurrence | 41.317, -73.966 |
| Putnam County Arsenic Mine | Arsenic, Sulfur, Iron | Chalcopyrite, Pyrite | Past Producer | 41.457, -73.716 |
| Montrose Emery Prospects | Emery | Corundum, Hematite, Ilmenite, Magnetite, Pyrite, Spinel | Past Producer | 41.240, -73.935 |
| De Luca Emery Mine | Emery | Corundum, Magnetite, Pyrite, Spinel | Producer | 41.283, -73.874 |
| Emery Hill Emery Prospects | Emery | Corundum, Magnetite, Pyrite, Spinel | Occurrence | 41.280, -73.879 |
| Oven Mountain Mine | Garnet | Feldspar, Garnet, Pyrite | Past Producer | 43.646, -73.978 |
| International Graphite Co. Property | Graphite | Feldspar, Graphite, Mica, Pyrite, Quartz | Past Producer | 43.757, -73.877 |
| Lakeside Mine | Graphite | Feldspar, Graphite, Pyrite, Quartz | Past Producer | 43.749, -73.497 |
| Hooper Brothers Mine | Graphite | Feldspar, Graphite, Pyrite, Quartz | Past Producer | 43.562, -73.487 |
| Mount Hope Mine | Iron | Feldspar, Iron, Pyrite, Quartz | Past Producer | 43.467, -73.572 |
| Rose Rock Quarry | Feldspar | Feldspar, Mica, Pyrite | Past Producer | 43.920, -73.453 |
| Champlain Graphite Co. Mine | Graphite | Graphite | Past Producer | 43.547, -73.469 |
| Lead Hill Deposit | Graphite | Graphite | Past Producer | 43.867, -73.475 |
| Potterville Prospect | Graphite | Graphite, Phlogopite, Pyrite | Occurrence | 43.692, -73.826 |
| Rock Pond Deposit | Graphite | Graphite, Pyrite | Past Producer | 43.855, -73.591 |
| Rock Pond Prospect | Graphite, Sulfur-Pyrite | Graphite, Pyrite | Past Producer | 43.854, -73.591 |
| Flake Graphite Co. Property | Graphite | Graphite, Pyrite | Past Producer | 43.139, -73.926 |
| Sacandaga Graphite Co | Graphite, Sulfur-Pyrite | Graphite, Pyrite | Past Producer | 43.316, -73.951 |
| Graphite Products Corp Mine | Graphite, Sulfur-Pyrite | Graphite, Pyrite | Past Producer | 43.142, -73.779 |
| Graphite Products Corp. | Graphite | Graphite, Pyrite | Past Producer | 43.141, -73.786 |
| Towne Prospect | Graphite | Graphite, Pyrite | Past Producer | 43.909, -73.500 |
| Betsy Cooke Prospect | Graphite | Graphite, Pyrite | Occurrence | 43.903, -73.511 |
| Hooper Bros. Mine | Graphite | Graphite, Pyrite | Past Producer | 43.561, -73.488 |
| Dixon's American Graphite Co. Mine | Graphite | Graphite, Pyrite | Past Producer | 43.751, -73.580 |
| Faxon Property | Graphite | Graphite, Pyrite | Occurrence | 43.743, -73.590 |
| Bly Property | Graphite | Graphite, Pyrite | Past Producer | 43.862, -73.590 |
| Empire Graphite Mine | Graphite | Graphite, Pyrite | Past Producer | 43.140, -73.928 |
| Rowland Mine | Graphite | Graphite, Pyrite, Quartz | Past Producer | 43.604, -73.969 |
| Moose Mountain Deposit | Titanium, Metal, Iron | Iron, Pyrite | Past Producer | 43.959, -73.618 |
| Potter Mine | Sulfur-Pyrite, Iron | Iron, Pyrite | Past Producer | 43.462, -73.565 |
| Minerva Mine | Iron | Iron, Pyrite | Past Producer | 43.819, -73.975 |
| Lee Mine | Iron, Titanium, Metal | Magnetite | Past Producer | 44.054, -73.471 |
| Clover Hill Magnetite Mine | Iron | Magnetite | Past Producer | 41.345, -73.680 |
| Sanford Hill Southern Extension | Iron, Titanium, Metal | Magnetite | Past Producer | 44.051, -74.055 |
| Croft Magnetite Mine | Iron | Magnetite, Pyrite | Past Producer | 41.367, -73.885 |
| Fonda | Platinum, Nickel | Platinum, Pyrite | Occurrence | 42.954, -74.372 |
| Mitchell Prospect | Sulfur-Pyrite, Iron, Pig Iron | Pyrite | Occurrence | 44.443, -75.327 |
| Pyrites Prospect | Sulfur-Pyrite | Pyrite | Past Producer | 44.517, -75.197 |
| Henricks Prospect | Sulfur-Pyrite | Pyrite | Occurrence | 44.405, -75.382 |
| Stella Mines | Sulfur-Pyrite | Pyrite | Past Producer | 44.479, -75.244 |
| Ludingtonville Pyrite Prospect | Iron, Sulfur | Pyrite | Occurrence | 41.513, -73.684 |
| Gold Hill Prospect | Iron, Pig Iron, Sulfur-Pyrite | Pyrite | Occurrence | 44.279, -75.604 |
| Cole Mine | Sulfur-Pyrite | Pyrite | Past Producer | 44.384, -75.396 |
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