Bristol Copper Mine: Bornite & Chalcocite Rockhounding in Naugatuck Valley Planning Region, Connecticut

Updated June 2026

Bristol Copper Mine is a mapped rockhounding spot in Naugatuck Valley Planning Region, Connecticut. Reported finds include bornite, chalcocite, calcite, chalcopyrite, chrysocolla, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Naugatuck Valley Planning Region
State: Connecticut
Nearest road: Mines Road
Postcode: 06010
Coordinates: 41.71876, -72.92351

Geology at Bristol Copper Mine

This spot sits on New Haven Arkose, mapped as arkose that formed roughly 235 to 175 million years ago. Sedimentary rock like this erodes unevenly, so the most productive collecting is typically along fresh cuts, badland slopes, and active drainages.

Mapped unit: New Haven Arkose
Age: 235–175 Ma (Late Triassic to Early Jurassic)
Rock types: arkose
Elevation: 320 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Best time to visit Bristol Copper Mine

Best months: March to November. Typical highs run 84°F in midsummer and 37°F in midwinter, with winter lows near 18°F.

Climate normals: NOAA 1991-2020 monthlies, BURLINGTON station (5 mi away), adjusted for elevation.

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.

Sources & verification

Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at Bristol Copper Mine

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Nearby rockhounding spots

Other rockhounding spots within driving distance of Bristol Copper Mine.

Across the state line from Bristol Copper Mine

Bristol Copper Mine is close enough to the Connecticut border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Bristol Copper Mine FAQ

Where is Bristol Copper Mine?+

Bristol Copper Mine is in Naugatuck Valley Planning Region, Connecticut, at 41.71876, -72.92351. Nearest road: Mines Road.

What rocks and minerals can you find at Bristol Copper Mine?+

Bristol Copper Mine is reported to produce Bornite, Chalcocite, Calcite, Chalcopyrite, Chrysocolla, Malachite.

Is collecting allowed at Bristol Copper Mine?+

Generally open to casual rockhounding. Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Bristol Copper Mine?+

A rock hammer, gloves, and safety glasses are enough for oxidized copper ground. Look for green and blue staining on weathered rock and in old dump piles.

When is the best time to visit Bristol Copper Mine?+

The most comfortable months at Bristol Copper Mine are March to November.

How do I get to Bristol Copper Mine?+

Open the directions link to navigate to 41.71876, -72.92351 in Google Maps. The nearest road is Mines Road.

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Open Bristol Copper Mine on the map

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