RockWoofFound alongside
Fluorite
Mohs 4. Cubes in purple, green or yellow; many glow under UV. Mindat
13 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
12 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
11 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
11 sites
Tourmaline
Mohs 7–7.5. Long striated crystals, often black (schorl) or green and pink (elbaite). Mindat
7 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
6 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Fairfield County (7) · Middlesex County (5) · Litchfield 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 |
| Burnett Fluorite Chalcopyrite Occurrence | — | Chalcopyrite, Fluorite, Malachite | Occurrence | 41.289, -73.220 |
| Microscopic Fluorite Occurrence No. El-001 | — | Fluorite | Occurrence | 41.245, -73.179 |
| Microscopic Fluorite Occurrence No. Ek-031 | — | Fluorite | Occurrence | 41.262, -73.180 |
| Microscopic Fluorite Occurrence No. Ek-030 | — | Fluorite | Occurrence | 41.254, -73.188 |
| Microscopic Fluorite Occurrence No. Ek-029 | — | Fluorite | Occurrence | 41.261, -73.207 |
| Slocum Beryl Feldspar Mine | Feldspar | Muscovite, Beryl, Quartz, Plagioclase, Perthite | Past Producer | 41.538, -72.466 |
| Gillette Gem Tourmaline, Mineral Specimens, Mica, Feldspar Mine (Also | Gemstone, Mica, Feldspar | Quartz, Perthite, Plagioclase, Muscovite, Tourmaline | Past Producer | 41.493, -72.511 |
| 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 |
| Gillette Quarry | — | — | Past Producer | 41.492, -72.511 |
| Strickland-Cramer Quarry | Mica, Feldspar | — | Past Producer | 41.592, -72.592 |
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