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
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
94 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
67 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
62 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
35 sites
Tourmaline
Mohs 7–7.5. Long striated crystals, often black (schorl) or green and pink (elbaite). Mindat
31 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
30 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Middlesex County (35) · Fairfield County (21) · Litchfield County (20) · Hartford County (12) · New Haven County (6)
Sites (first 60)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Amethyst, Bitumen Vein Quartz Occurrence No. Dj-036 | Gemstone, Rock Asphalt | Amethyst, Calcite, Quartz | Occurrence | 41.626, -72.785 |
| Roxbury Iron Mine | Iron | Arsenopyrite, Galena, Chalcopyrite, Pyrite, Sphalerite, Siderite | Past Producer | 41.568, -73.339 |
| 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 |
| Rock Landing Feldspar Quarries | Feldspar | Beryl, Quartz, Feldspar | Past Producer | 41.509, -72.523 |
| Bordonaro Beryl Prospect and Feldspar and Mica Mine | Feldspar | Beryl, Quartz, Muscovite, Plagioclase | Past Producer | 41.622, -72.597 |
| Sphalerite Vein Quartz Occurrence No. Dj-023 | Zinc, Sulfur | Calcite, Prehnite, Quartz, Sphalerite | Occurrence | 41.707, -72.830 |
| Old Sandy Hook Gold Mine Prospect and Sulfide Occurrence | Lead | Calcite, Sphalerite, Hematite, Quartz, Pyrite, Galena | Occurrence | 41.432, -73.282 |
| Burnett Fluorite Chalcopyrite Occurrence | — | Chalcopyrite, Fluorite, Malachite | Occurrence | 41.289, -73.220 |
| Upper Merryall Pegmatite Quarry | Feldspar, Quartz | Feldspar | Producer | 41.624, -73.434 |
| 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 |
| Bethel Feldspar Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.358, -73.355 |
| Captain Cook Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.354, -73.328 |
| Woodbury Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.579, -73.204 |
| Andrews Pegmatite Quarry | Feldspar | Feldspar, Quartz | Past Producer | 41.631, -72.600 |
| Feldspar Pegmatite Quarry No. Cj-033 | Feldspar | Feldspar, Quartz | Past Producer | 41.571, -72.571 |
| Feldspar Pegmatite Quarry No. Cj-021 | Feldspar | Feldspar, Quartz | Past Producer | 41.626, -72.596 |
| Feldspar Pegmatite Quarry No. Cj-062 | Feldspar | Feldspar, Quartz | Producer | 41.500, -72.528 |
| Feldspar Pegmatite Quarry No. Cj-044 | Feldspar | Feldspar, Quartz | Past Producer | 41.528, -72.598 |
| Feldspar Pegmatite Quarry No. Cj-045 | Feldspar | Feldspar, Quartz | Past Producer | 41.519, -72.596 |
| Feldspar Pegmatite Dike No. Cj-049 | Feldspar | Feldspar, Quartz | Past Producer | 41.548, -72.543 |
| Feldspar Pegmatite Dike Quarry No. Cj-047 | Feldspar | Feldspar, Quartz | Past Producer | 41.503, -72.560 |
| Feldspar Pegmatite Prospects No. Cj-054 | — | Feldspar, Quartz | Occurrence | 41.519, -72.531 |
| Feldspar Pegmatite Quarries No. Cj-016 | Feldspar | Feldspar, Quartz | Past Producer | 41.649, -72.599 |
| Feldspar Pegmatite Quarries No. Cj-015 | Feldspar | Feldspar, Quartz | Past Producer | 41.655, -72.599 |
| Feldspar Pegmatite Quarry No. Cj-025 | Feldspar | Feldspar, Quartz | Past Producer | 41.605, -72.572 |
| Feldspar Pegmatite Quarries No. Cj-013 | Feldspar | Feldspar, Quartz | Past Producer | 41.678, -72.562 |
| 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 |
| 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 |
| 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 |
| Bristol Copper Mine | Molybdenum, Silver, Copper, Sulfur | Molybdenite, Barite, Pyrite, Sphalerite, Galena, Chalcocite, Chalcopyrite, Bornite, Malachite | Past Producer | 41.719, -72.924 |
| 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 Occurrences No. Ek-003 | Copper | Pyrite, Chalcopyrite | Occurrence | 41.412, -73.071 |
| Copper Prospect No. Ek-002 | Copper | Pyrite, Chalcopyrite | Occurrence | 41.429, -73.074 |
| 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 |
| Beryl Feldspar Pegmatite Prospect No. Cj-035 | Feldspar | Quartz, Beryl, Feldspar | Occurrence | 41.564, -72.599 |
| State Forest No. 2 Mica Mine | Mica | Quartz, Beryl, Feldspar, Mica | Past Producer | 41.575, -72.552 |
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