RockWoofFound alongside
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
27 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
19 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
16 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
12 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
12 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
8 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Litchfield County (11) · Fairfield County (11) · Hartford County (2) · New Haven County (2) · Middlesex County (1)
Sites
| 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 |
| 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 |
| Microscopic Fluorite Occurrence No. Ek-030 | — | Fluorite | Occurrence | 41.254, -73.188 |
| Microscopic Fluorite Occurrence No. Ek-029 | — | Fluorite | Occurrence | 41.261, -73.207 |
| 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 |
| Hardy Nickel Sulfide Mine | Sulfur, Iron, Nickel | Hematite, Ilmenite, Magnetite | Past Producer | 41.742, -73.262 |
| Unnamed Magnetite Occurrence | Iron | Magnetite | Occurrence | 41.703, -72.984 |
| Buck Hill Magnetite Mine | Iron | Magnetite | Prospect | 41.813, -73.404 |
| Unnamed Magnetite Occurrence | Iron | Magnetite | Occurrence | 41.947, -73.119 |
| Unnamed Magnetite Occurrence | Iron | Magnetite | Occurrence | 41.676, -73.363 |
| Unnamed Magnetite Occurrence | Iron | Magnetite | Occurrence | 41.263, -73.423 |
| Mitchell Nickel Sulfide Mine | Sulfur, Iron, Nickel | Magnetite, Marcasite, Pentlandite, Chalcopyrite, Pyrrhotite, Pyrite, Hematite, Ilmenite | Past Producer | 41.725, -73.264 |
| Buck Nickel Sulfide Mine | Iron, Sulfur, Nickel | Magnetite, Marcasite, Pentlandite, Chalcopyrite, Pyrrhotite, Pyrite, Hematite, Ilmenite | Past Producer | 41.729, -73.262 |
| 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 |
| Hodges Nickel and Sulfide Prospect | Copper, Nickel, Sulfur | Pentlandite, Pyrrhotite, Pyrite, Chalcopyrite | Occurrence | 41.833, -73.166 |
| Booth's Lower Level Bismuth and Sulfide Mine | Bismuth | Quartz, Bismuth, Arsenopyrite, Sphalerite, Pyrite, Chalcopyrite, Pyrrhotite | Past Producer | 41.335, -73.189 |
| Booth's Upper Level Bismuth and Sulfide Prospect | Bismuth | Quartz, Pyrrhotite | Occurrence | 41.342, -73.191 |
| Upper Triassic Copper Prospects No. Cj-053 | Copper | — | Occurrence | 41.526, -72.535 |
| 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 |
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