RockWoofFound alongside
Tourmaline
Mohs 7–7.5. Long striated crystals, often black (schorl) or green and pink (elbaite). Mindat
32 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
31 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
28 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
26 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
25 sites
Beryl
Mohs 7.5–8. Six-sided crystals; aquamarine and emerald are beryl. Mindat
23 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Middlesex County (19) · Litchfield County (5) · Fairfield County (5) · Hartford County (2) · New Haven 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 |
| Bordonaro Beryl Prospect and Feldspar and Mica Mine | Feldspar | Beryl, Quartz, Muscovite, Plagioclase | Past Producer | 41.622, -72.597 |
| Ridgefield Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.296, -73.518 |
| Captain Cook Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.354, -73.328 |
| Bethel Feldspar Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.358, -73.355 |
| Woodbury Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.579, -73.204 |
| Upper Merryall Pegmatite Quarry | Feldspar, Quartz | Feldspar | Producer | 41.624, -73.434 |
| Microscopic Fluorite Occurrence No. El-001 | — | Fluorite | Occurrence | 41.245, -73.179 |
| Kent Limonite Mine | Iron, Manganese | Limonite, Melanterite, Pyrolusite, Siderite, Sphalerite | Past Producer | 41.687, -73.448 |
| 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 |
| Slocum Beryl Feldspar Mine | Feldspar | Muscovite, Beryl, Quartz, Plagioclase, Perthite | Past Producer | 41.538, -72.466 |
| Knapp Mica Prospect | Mica | Muscovite, Plagioclase, Quartz | Past Producer | 41.870, -72.938 |
| 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 |
| 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 |
| State Forest No. 2 Mica Mine | Mica | Quartz, Beryl, Feldspar, Mica | Past Producer | 41.575, -72.552 |
| Hale Pegmatite Quarry | Feldspar | Quartz, Beryl, Tourmaline, Muscovite, Microperthite | Producer | 41.629, -72.598 |
| Enegren (Power) Mica Mine | Mica | Quartz, Perthite, Muscovite | Producer | 41.517, -72.522 |
| Gillette Gem Tourmaline, Mineral Specimens, Mica, Feldspar Mine (Also | Gemstone, Mica, Feldspar | Quartz, Perthite, Plagioclase, Muscovite, Tourmaline | Past Producer | 41.493, -72.511 |
| Howe No. 1 Feldspar Quarry | Feldspar | Quartz, Tourmaline, Beryl, Muscovite, Perthite, Plagioclase | Past Producer | 41.639, -72.601 |
| Hale-Walker Beryl Prospect and Feldspar Mine | Beryllium, Tantalum, Niobium (Columbium), Feldspar | Tantalite, Columbite, Monazite, Quartz, Beryl, Feldspar | Past Producer | 41.587, -72.588 |
| East Selden Mica, Beryl, Feldspar Quarry | Mica, Feldspar, Tantalum, Niobium (Columbium) | Tantalite, Columbite, Quartz, Feldspar, Beryl, Plagioclase, Muscovite | Past Producer | 41.530, -72.529 |
| Tollgate Mica-Feldspar Mine | Niobium (Columbium), Feldspar, Mica, Tantalum | Tantalite, Columbite, Quartz, Feldspar, Muscovite | Past Producer | 41.532, -72.611 |
| Branchville Mica Mine | Niobium (Columbium), Tantalum, Quartz, Feldspar, Mica | Tantalite, Columbite, Quartz, Feldspar, Plagioclase, Muscovite | Past Producer | 41.267, -73.439 |
| Strickland-Cramer Feldspar-Mica Quarries | Tantalum, Niobium (Columbium), Beryllium, Mica, REE, Feldspar | Tantalite, Columbite, Quartz, Uraninite, Garnet, Lepidolite, Spodumene, Beryl, Mica, Feldspar | Past Producer | 41.592, -72.592 |
| Arnold Pegmatite Quarry | Feldspar | — | Producer | 41.472, -72.507 |
| 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