RockWoofFound alongside
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
92 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
52 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
37 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
32 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
17 sites
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
14 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
St. Lawrence County (29) · Washington County (12) · Warren County (11) · Essex County (8) · Columbia County (6) · Saratoga County (6) · Putnam County (5) · Jefferson County (4) · Montgomery County (2) · Westchester County (2) · Greene County (2) · Clinton County (1) · Hamilton County (1) · Albany County (1) · Lewis County (1) · Fulton County (1)
Sites (first 60)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| 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 |
| 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 |
| Burden No. 3 Iron Carbonate Mine | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.163, -73.799 |
| Livington's Iron Carbonate Mine | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.177, -73.832 |
| Cedar Hill Iron Carbonate Openings | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.178, -73.833 |
| Burden No. 2 Carbonate Iron Mine | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.160, -73.825 |
| Mt. Tom Carbonate Iron Mine | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.166, -73.829 |
| Plass Hill Carbonate Iron Mine | Iron | Calcite, Pyrite, Quartz, Siderite | Producer | 42.207, -73.835 |
| Croton-Mc Collum Magnetite Mine | Iron | Chalcopyrite, Magnetite, Pyrite | Past Producer | 41.365, -73.654 |
| Croton - Theall Magnetite Mine | Iron | Chalcopyrite, Magnetite, Pyrite | Past Producer | 41.368, -73.651 |
| Maple Ave Quarry | Dolomite | Dolomite, Quartz | Producer | 43.094, -73.777 |
| 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 |
| Adirondack Mining and Milling Co Mine | Graphite | Feldspar, Mica | Past Producer | 43.553, -73.472 |
| Ashley Quarry | Quartz, Feldspar | Feldspar, Quartz | Past Producer | 43.437, -73.517 |
| Corinth Feldspar Co. | Feldspar | Feldspar, Quartz | Occurrence | 43.238, -73.888 |
| Unnamed Occurrence | Granite, Quartz | Granite, Mica, Quartz | Occurrence | 43.745, -73.963 |
| Lakeside Mine | Graphite | Graphite | Past Producer | 43.752, -73.494 |
| Champlain Graphite Co. Mine | Graphite | Graphite | Past Producer | 43.547, -73.469 |
| Rock Pond Deposit | Graphite | Graphite, Pyrite | Past Producer | 43.855, -73.591 |
| Bly Property | Graphite | Graphite, Pyrite | Past Producer | 43.862, -73.590 |
| Faxon Property | Graphite | Graphite, Pyrite | Occurrence | 43.743, -73.590 |
| Dixon's American Graphite Co. Mine | Graphite | Graphite, Pyrite | Past Producer | 43.751, -73.580 |
| Hooper Bros. Mine | Graphite | Graphite, Pyrite | Past Producer | 43.561, -73.488 |
| Graphite Products Corp. | Graphite | Graphite, Pyrite | Past Producer | 43.141, -73.786 |
| Empire Graphite Mine | Graphite | Graphite, Pyrite | Past Producer | 43.140, -73.928 |
| Rowland Mine | Graphite | Graphite, Pyrite, Quartz | Past Producer | 43.604, -73.969 |
| Benson Mine and Mill | Iron | Hematite, Magnetite | Past Producer | 44.179, -75.006 |
| Skiff Mine | Iron | Iron, Quartz | Past Producer | 43.884, -73.600 |
| Hammondville Mines | Iron | Iron, Quartz | Past Producer | 43.915, -73.610 |
| Arnold Hill Mines | Iron | Magnetite | Past Producer | 44.489, -73.617 |
| Clover Hill Magnetite Mine | Iron | Magnetite | Past Producer | 41.345, -73.680 |
| Unnamed Magnetite Mine Dep. No. 17 | Iron | Magnetite | Past Producer | 41.486, -73.817 |
| Parish Deposit | Iron | Magnetite | Occurrence | 44.353, -74.947 |
| Fonda | Platinum, Nickel | Platinum, Pyrite | Occurrence | 42.954, -74.372 |
| Henricks Prospect | Sulfur-Pyrite | Pyrite | Occurrence | 44.405, -75.382 |
| Pyrites Prospect | Sulfur-Pyrite | Pyrite | Past Producer | 44.517, -75.197 |
| Mitchell Prospect | Sulfur-Pyrite, Iron, Pig Iron | Pyrite | Occurrence | 44.443, -75.327 |
| Stella Mines | Sulfur-Pyrite | Pyrite | Past Producer | 44.479, -75.244 |
| 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 |
| Balmat No. 2, 3, and 4 mines | Zinc | Sphalerite, Galena | Past Producer | 44.264, -75.407 |
| Balmat - Edwards District | Zinc | Sphalerite, Pyrite, Galena, Pyrrhotite, Chalcopyrite, Marcasite, Magnetite, Hematite | Producer | 44.283, -75.333 |
| Edwards Mine | Zinc | Sphalerite, Pyrite, Galena, Pyrrhotite, Magnetite, Hematite, Barite | Past Producer | 44.331, -75.267 |
| Morgan Prospect | Sulfur-Pyrite | — | Occurrence | 44.254, -75.571 |
| Keene Prospect | Sulfur-Pyrite | — | Occurrence | 44.261, -75.569 |
| Caledonia Prospect | Sulfur-Pyrite | — | Occurrence | 44.276, -75.536 |
| Kilburn Prospect | Sulfur-Pyrite, Iron, Pig Iron | — | Occurrence | 44.273, -75.416 |
| White Crystal Dolomite Deposits | Marble, Dimension | — | Past Producer | 44.380, -75.470 |
| De Kalb Deposit | Feldspar | — | Past Producer | 44.459, -75.311 |
| Uniform Fibrous Talc Co. Mines | Talc-Soapstone | — | Past Producer | 44.307, -75.317 |
| O'Brien Farm Prospect | Iron | — | Occurrence | 44.499, -75.105 |
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