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
42 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
30 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
28 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
15 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
13 sites
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
12 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Litchfield County (19) · Fairfield County (9) · New Haven County (6) · Hartford County (4) · Middlesex County (4)
Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Roxbury Iron Mine | Iron | Arsenopyrite, Galena, Chalcopyrite, Pyrite, Sphalerite, Siderite | Past Producer | 41.568, -73.339 |
| Jinny Hill Barite Mine | Barium-Barite | Barite, Bornite, Calcite, Chalcocite, Chalcopyrite, Chrysocolla, Cuprite, Hematite, Malachite, Stilpnomelane | Past Producer | 41.479, -72.893 |
| Mattabesset River Lead Mine | Lead | Barite, Galena, Pyrite, Sphalerite | Past Producer | 41.621, -72.791 |
| 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 |
| Old Sandy Hook Gold Mine Prospect and Sulfide Occurrence | Lead | Calcite, Sphalerite, Hematite, Quartz, Pyrite, Galena | Occurrence | 41.432, -73.282 |
| Copper Mine No. Di-008 | Sulfur, Copper | Chalcopyrite | Past Producer | 41.835, -72.916 |
| Simsbury Newgate Prison Copper Mine | Copper | Chalcopyrite, Coffinite, Uraninite, Malachite, Azurite, Bornite, Chalcocite, Brochantite | Past Producer | 41.962, -72.746 |
| Burnett Fluorite Chalcopyrite Occurrence | — | Chalcopyrite, Fluorite, Malachite | Occurrence | 41.289, -73.220 |
| Woodbury Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.579, -73.204 |
| 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 |
| Curtis Nickel Sulfide Prospect | Sulfur, Iron, Nickel | Magnetite, Marcasite, Pentlandite, Chalcopyrite, Pyrrhotite, Pyrite, Hematite, Ilmenite | Past Producer | 41.733, -73.274 |
| Pool Nickel Sulfide Mine | Sulfur, Iron, Nickel | Magnetite, Marcasite, Pentlandite, Chalcopyrite, Pyrrhotite, Pyrite, Hematite, Ilmenite | Past Producer | 41.739, -73.259 |
| Grannis Nickel Sulfide Mine | Sulfur, Iron, Nickel | Magnetite, Marcasite, Pentlandite, Chalcopyrite, Pyrrhotite, Pyrite, Hematite, Ilmenite | Past Producer | 41.737, -73.273 |
| 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 |
| Copper Prospect No. Dj-012 | Copper | Marcasite, Pentlandite, Chalcopyrite, Pyrrhotite, Pyrite | Occurrence | 41.543, -72.884 |
| Bristol Copper Mine | Molybdenum, Silver, Copper, Sulfur | Molybdenite, Barite, Pyrite, Sphalerite, Galena, Chalcocite, Chalcopyrite, Bornite, Malachite | Past Producer | 41.719, -72.924 |
| Southford Quartz Pegmatite Quarry | Quartz | Muscovite, Plagioclase, Quartz | Producer | 41.449, -73.176 |
| Hodges Nickel and Sulfide Prospect | Copper, Nickel, Sulfur | Pentlandite, Pyrrhotite, Pyrite, Chalcopyrite | Occurrence | 41.833, -73.166 |
| 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 |
| Mount Prospect | Nickel | Pyrite, Chalcopyrite, Pentlandite, Pyrrhotite | Past Producer | 41.833, -73.317 |
| 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 |
| 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 |
| Monroe (Lane's Mine) | Silver, Bismuth, Tungsten | Silver, Bismuth, Arsenopyrite, Galena, Sphalerite, Marcasite, Scheelite, Tungstite, Wolframite | Occurrence | 41.367, -73.200 |
| Wilton Silver and Galena Chalcopyrite Mine | Silver | Sphalerite, Chalcopyrite, Pyrite, Galena | Past Producer | 41.238, -73.430 |
| Middletown Lead-Silver Mine | Silver, Lead | Sphalerite, Chalcopyrite, Pyrite, Galena, Fluorite, Barite, Anglesite, Hydrozincite, Marcasite | Past Producer | 41.559, -72.612 |
| Trumbull Tungsten, Topaz, and Sulfide Mine | Feldspar, Quartz, Tungsten | Sphalerite, Galena, Fluorite, Marcasite, Chalcopyrite, Pyrite, Limestone, Quartz, Feldspar, Scheelite, Wolframite, Bismuth, Barite, Arsenopyrite, Topaz | Past Producer | 41.290, -73.226 |
| Branchville Mica Mine | Niobium (Columbium), Tantalum, Quartz, Feldspar, Mica | Tantalite, Columbite, Quartz, Feldspar, Plagioclase, Muscovite | Past Producer | 41.267, -73.439 |
| Buck Deposit | — | — | Past Producer | 41.729, -73.262 |
| Grannis Deposit | — | — | Past Producer | 41.737, -73.272 |
| Hardy Deposit | — | — | Past Producer | 41.709, -73.262 |
| Great Hill | — | — | Past Producer | 41.583, -72.504 |
| Mitchell Nickel Sulfide Mine | — | — | Past Producer | 41.967, -73.262 |
| Strickland-Cramer Quarry | Mica, Feldspar | — | Past Producer | 41.592, -72.592 |
| Pool Deposit | — | — | Past Producer | 41.739, -73.258 |
| Curtis Deposit | — | — | Past Producer | 41.733, -73.275 |
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