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
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
118 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
92 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
62 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
32 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
28 sites
Tourmaline
Mohs 7–7.5. Long striated crystals, often black (schorl) or green and pink (elbaite). Mindat
26 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Middlesex County (54) · Litchfield County (21) · Fairfield County (19) · Hartford County (17) · New Haven County (7)
Sites (first 60)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Thomaston Fluorite and Sulfide Occurrence | Iron, Fluorine-Fluorite, Lead | Barite, Sphalerite, Chalcopyrite, Pyrite, Galena, Fluorite | Occurrence | 41.700, -73.068 |
| East Village Monroe Feldspar Pegmatite Quarry | Feldspar | Beryl, Columbite, Feldspar, Garnet | Past Producer | 41.365, -73.184 |
| Bordonaro Beryl Prospect and Feldspar and Mica Mine | Feldspar | Beryl, Quartz, Muscovite, Plagioclase | Past Producer | 41.622, -72.597 |
| Copper Mine No. Di-008 | Sulfur, Copper | Chalcopyrite | Past Producer | 41.835, -72.916 |
| Burnett Fluorite Chalcopyrite Occurrence | — | Chalcopyrite, Fluorite, Malachite | Occurrence | 41.289, -73.220 |
| Chatham Great Hill Cobalt Nickel Arsenopyrite Mine | Arsenic, Iron, Nickel, Cobalt | Cobaltite, Erythrite, Galena, Niccolite, Siderite, Smaltite, Sphalerite | Past Producer | 41.577, -72.550 |
| Pegmatite Prospect No. Di-002 | Feldspar, Quartz | Feldspar | Past Producer | 41.983, -72.868 |
| Ridgefield Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.296, -73.518 |
| Hollister Mica Beryl Prospect | Feldspar, Mica, Beryllium, Tantalum, Niobium (Columbium) | Feldspar, Quartz, Beryl, Mica, Tantalite, Columbite | Producer | 41.648, -72.593 |
| Spinelli Feldspar-Samarskite Pegmatite Prospect Quarry | Tantalum, REE, Niobium (Columbium), Beryllium, Mica, Feldspar | Feldspar, Quartz, Samarskite, Muscovite, Plagioclase | Past Producer | 41.684, -72.554 |
| Microscopic Fluorite Occurrence No. Ek-029 | — | Fluorite | Occurrence | 41.261, -73.207 |
| Microscopic Fluorite Occurrence No. Ek-030 | — | Fluorite | Occurrence | 41.254, -73.188 |
| Microscopic Fluorite Occurrence No. Ek-031 | — | Fluorite | Occurrence | 41.262, -73.180 |
| Microscopic Fluorite Occurrence No. El-001 | — | Fluorite | Occurrence | 41.245, -73.179 |
| Lane's Bismuth and Sulfide Mine In Monroe | Bismuth | Galena, Bismuth, Arsenopyrite, Sphalerite, Marcasite, Pyrrhotite | Past Producer | 41.333, -73.214 |
| Bassett's Arsenopyrite Mine | Arsenic | Galena, Pyrite, Sphalerite | Occurrence | 41.342, -73.099 |
| Davis Limonite Mine | Iron, Manganese | Limonite | Past Producer | 41.973, -73.438 |
| Grannis Nickel Sulfide Mine | Sulfur, Iron, Nickel | Magnetite, Marcasite, Pentlandite, Chalcopyrite, Pyrrhotite, Pyrite, Hematite, Ilmenite | Past Producer | 41.737, -73.273 |
| Pool Nickel Sulfide Mine | Sulfur, Iron, Nickel | Magnetite, Marcasite, Pentlandite, Chalcopyrite, Pyrrhotite, Pyrite, Hematite, Ilmenite | Past Producer | 41.739, -73.259 |
| Buck Nickel Sulfide Mine | Iron, Sulfur, Nickel | Magnetite, Marcasite, Pentlandite, Chalcopyrite, Pyrrhotite, Pyrite, Hematite, Ilmenite | Past Producer | 41.729, -73.262 |
| Mitchell Nickel Sulfide Mine | Sulfur, Iron, Nickel | Magnetite, Marcasite, Pentlandite, Chalcopyrite, Pyrrhotite, Pyrite, Hematite, Ilmenite | Past Producer | 41.725, -73.264 |
| Reeb Mica Mine | Mica | Mica, Plagioclase, Quartz | Past Producer | 41.547, -72.536 |
| Markham Mica Mine | Mica | Mica, Quartz | Past Producer | 41.549, -72.535 |
| Slocum Beryl Feldspar Mine | Feldspar | Muscovite, Beryl, Quartz, Plagioclase, Perthite | Past Producer | 41.538, -72.466 |
| Green Mountain Feldspar and Mica Mine | Feldspar, Mica | Muscovite, Plagioclase, Quartz | Past Producer | 41.865, -73.366 |
| Knapp Mica Prospect | Mica | Muscovite, Plagioclase, Quartz | Past Producer | 41.870, -72.938 |
| Roberts Mica Prospect | Feldspar, Mica | Muscovite, Plagioclase, Quartz | Past Producer | 41.491, -72.621 |
| Southford Quartz Pegmatite Quarry | Quartz | Muscovite, Plagioclase, Quartz | Producer | 41.449, -73.176 |
| Roebling Mica, Feldspar, Beryl Mine | Mica, Feldspar, Gemstone | Muscovite, Plagioclase, Quartz | Past Producer | 41.656, -73.435 |
| White Rock Pegmatite Quarries | Feldspar | Muscovite, Quartz, Beryl, Feldspar | Producer | 41.553, -72.606 |
| Mt. Tom Beryl Prospect | Beryllium | Muscovite, Quartz, Plagioclase, Beryl | Occurrence | 41.494, -72.476 |
| Hodges Nickel and Sulfide Prospect | Copper, Nickel, Sulfur | Pentlandite, Pyrrhotite, Pyrite, Chalcopyrite | Occurrence | 41.833, -73.166 |
| Great Hill State Forest No. 1 Mica Quarry | Mica | Perthite, Beryl, Plagioclase, Quartz, Muscovite | Past Producer | 41.596, -72.541 |
| Anderson Mica Mines and Swanson Lithia Mine | Mica, Lithium | Perthite, Muscovite, Plagioclase, Quartz, Cleavelandite, Lepidolite | Past Producer | 41.515, -72.522 |
| Gotta-Walden Feldspar Prospect Quarry | Feldspar | Plagioclase, Quartz | Past Producer | 41.619, -72.594 |
| Pyrite Occurrence No. Fj-022 | Sulfur-Pyrite | Pyrite | Occurrence | 41.647, -73.317 |
| Copper Prospect No. Ek-002 | Copper | Pyrite, Chalcopyrite | Occurrence | 41.429, -73.074 |
| Copper Occurrences No. Ek-003 | Copper | Pyrite, Chalcopyrite | Occurrence | 41.412, -73.071 |
| Nickel Sulfide Prospect No. Fj-007 | Sulfur, Iron, Nickel | Pyrite, Pentlandite, Chalcopyrite, Pyrrhotite | Occurrence | 41.726, -73.260 |
| Nickel Sulfide Prospect No. Fj-009 | Sulfur, Iron, Nickel | Pyrite, Pentlandite, Chalcopyrite, Pyrrhotite | Occurrence | 41.721, -73.256 |
| State Forest No. 2 Mica Mine | Mica | Quartz, Beryl, Feldspar, Mica | Past Producer | 41.575, -72.552 |
| Hale Pegmatite Quarry | Feldspar | Quartz, Beryl, Tourmaline, Muscovite, Microperthite | Producer | 41.629, -72.598 |
| Booth's Lower Level Bismuth and Sulfide Mine | Bismuth | Quartz, Bismuth, Arsenopyrite, Sphalerite, Pyrite, Chalcopyrite, Pyrrhotite | Past Producer | 41.335, -73.189 |
| Enegren (Power) Mica Mine | Mica | Quartz, Perthite, Muscovite | Producer | 41.517, -72.522 |
| Gillette Gem Tourmaline, Mineral Specimens, Mica, Feldspar Mine (Also | Gemstone, Mica, Feldspar | Quartz, Perthite, Plagioclase, Muscovite, Tourmaline | Past Producer | 41.493, -72.511 |
| Booth's Upper Level Bismuth and Sulfide Prospect | Bismuth | Quartz, Pyrrhotite | Occurrence | 41.342, -73.191 |
| Howe No. 1 Feldspar Quarry | Feldspar | Quartz, Tourmaline, Beryl, Muscovite, Perthite, Plagioclase | Past Producer | 41.639, -72.601 |
| Wilton Silver and Galena Chalcopyrite Mine | Silver | Sphalerite, Chalcopyrite, Pyrite, Galena | Past Producer | 41.238, -73.430 |
| Hale-Walker Beryl Prospect and Feldspar Mine | Beryllium, Tantalum, Niobium (Columbium), Feldspar | Tantalite, Columbite, Monazite, Quartz, Beryl, Feldspar | Past Producer | 41.587, -72.588 |
| East Selden Mica, Beryl, Feldspar Quarry | Mica, Feldspar, Tantalum, Niobium (Columbium) | Tantalite, Columbite, Quartz, Feldspar, Beryl, Plagioclase, Muscovite | Past Producer | 41.530, -72.529 |
| Tollgate Mica-Feldspar Mine | Niobium (Columbium), Feldspar, Mica, Tantalum | Tantalite, Columbite, Quartz, Feldspar, Muscovite | Past Producer | 41.532, -72.611 |
| Branchville Mica Mine | Niobium (Columbium), Tantalum, Quartz, Feldspar, Mica | Tantalite, Columbite, Quartz, Feldspar, Plagioclase, Muscovite | Past Producer | 41.267, -73.439 |
| Strickland-Cramer Feldspar-Mica Quarries | Tantalum, Niobium (Columbium), Beryllium, Mica, REE, Feldspar | Tantalite, Columbite, Quartz, Uraninite, Garnet, Lepidolite, Spodumene, Beryl, Mica, Feldspar | Past Producer | 41.592, -72.592 |
| Slater's Feldspar Pegmatite Quarries | Feldspar | — | Past Producer | 41.531, -72.471 |
| Quartz Rock Quarry No. Ek-023 | Quartz | — | Past Producer | 41.304, -73.126 |
| Arsenopyrite Mine No. Ek-017 | Arsenic | — | Past Producer | 41.354, -73.234 |
| Seymour Nickel Mine Brook Arsenic and Nickel Mine. | Nickel, Arsenic | — | Past Producer | 41.377, -73.084 |
| Stevenson Bowers Hill Copper Mine | Copper | — | Past Producer | 41.393, -73.169 |
| Buck Deposit | — | — | Past Producer | 41.729, -73.262 |
| Pegmatite Quarry | — | — | Past Producer | 41.486, -73.506 |
Back to Rockhounding in Connecticut.
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