RockWoofFound alongside
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
16 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
6 sites
Galena
Mohs 2.5–2.75. Heavy, silvery lead ore that breaks into cubes. Mindat
5 sites
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
5 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
3 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
New Haven County (6) · Fairfield County (4) · Litchfield County (3) · Hartford County (2) · Middlesex County (1)
Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Roxbury Iron Mine | Iron | Arsenopyrite, Galena, Chalcopyrite, Pyrite, Sphalerite, Siderite | Past Producer | 41.568, -73.339 |
| Cheshire Barytes Co. Mine | Barium-Barite | Barite | Past Producer | 41.519, -72.912 |
| New Haven Mineral Co. Barite Mine | Barium-Barite | Barite | Past Producer | 41.550, -72.895 |
| Jinny Hill Barite Mine | Barium-Barite | Barite, Bornite, Calcite, Chalcocite, Chalcopyrite, Chrysocolla, Cuprite, Hematite, Malachite, Stilpnomelane | Past Producer | 41.479, -72.893 |
| Bristol Copper Mine | Molybdenum, Silver, Copper, Sulfur | Molybdenite, Barite, Pyrite, Sphalerite, Galena, Chalcocite, Chalcopyrite, Bornite, Malachite | Past Producer | 41.719, -72.924 |
| 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 |
| Silver Prospect No. Dk-019 | Silver | — | Occurrence | 41.301, -72.849 |
| Roxbury Iron Mine | Iron | — | Past Producer | 41.571, -73.338 |
| Maltby Lakes Mine | Lead | — | Past Producer | 41.302, -72.986 |
| Silver Mine | Silver | — | Past Producer | 41.386, -73.054 |
| Silver Mine | Silver | — | Past Producer | 41.901, -73.293 |
| Silver Mine | Silver | — | Past Producer | 41.735, -73.385 |
| Handy & Harmon Refin/Fairfield, Ct. | Silver | — | Plant | 41.144, -73.250 |
| Gold & Silver Mine | — | — | Past Producer | 41.434, -73.281 |
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