RockWoofFound alongside
Beryl
Mohs 7.5–8. Six-sided crystals; aquamarine and emerald are beryl. Mindat
27 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
27 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
25 sites
Tourmaline
Mohs 7–7.5. Long striated crystals, often black (schorl) or green and pink (elbaite). Mindat
23 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
20 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
19 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Middlesex County (17) · Fairfield County (4) · Litchfield County (3) · 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 |
| 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 |
| Upper Merryall Pegmatite Quarry | Feldspar, Quartz | Feldspar | Producer | 41.624, -73.434 |
| Captain Cook Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.354, -73.328 |
| Bethel Feldspar Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.358, -73.355 |
| Ridgefield Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.296, -73.518 |
| Woodbury Pegmatite Quarry | Feldspar | Feldspar | Past Producer | 41.579, -73.204 |
| Hollister Mica Beryl Prospect | Feldspar, Mica, Beryllium, Tantalum, Niobium (Columbium) | Feldspar, Quartz, Beryl, Mica, Tantalite, Columbite | Producer | 41.648, -72.593 |
| Slocum Beryl Feldspar Mine | Feldspar | Muscovite, Beryl, Quartz, Plagioclase, Perthite | Past Producer | 41.538, -72.466 |
| Southford Quartz Pegmatite Quarry | Quartz | Muscovite, Plagioclase, Quartz | Producer | 41.449, -73.176 |
| 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 |
| 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 |
| 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 |
| 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