Lamberts Mine: Chalcopyrite Rockhounding in South Central Connecticut Planning Region, Connecticut

Updated June 2026

Lamberts Mine is a mapped rockhounding spot in South Central Connecticut Planning Region, Connecticut. Reported finds include chalcopyrite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: South Central Connecticut Planning Region
State: Connecticut
Nearest road: Derby Turnpike
Postcode: 06516
Coordinates: 41.30629, -72.98279

Geology at Lamberts Mine

This spot sits on Lower part [of Maltby Lakes Metavolcanics], mapped as greenstone and schist that formed roughly 470 to 460 million years ago. Metamorphic rock like this weathers into resistant float, and minerals that survive transport typically concentrate in nearby drainages.

Mapped unit: Lower part [of Maltby Lakes Metavolcanics]
Age: 470–460 Ma (Middle Ordovician)
Rock types: greenstone and schist
Elevation: 230 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 Lamberts Mine

Best months: March to November. Typical highs run 81°F in midsummer and 37°F in midwinter, with winter lows near 22°F.

Climate normals: NOAA 1991-2020 monthlies, NEW HAVEN TWEED AP station (6 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 Lamberts Mine

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

Chalcopyrite Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Lamberts Mine.

Across the state line from Lamberts Mine

Lamberts 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.

Lamberts Mine FAQ

Where is Lamberts Mine?+

Lamberts Mine is in South Central Connecticut Planning Region, Connecticut, at 41.30629, -72.98279. Nearest road: Derby Turnpike.

What rocks and minerals can you find at Lamberts Mine?+

Lamberts Mine is reported to produce Chalcopyrite.

Is collecting allowed at Lamberts 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 Lamberts 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 Lamberts Mine?+

The most comfortable months at Lamberts Mine are March to November.

How do I get to Lamberts Mine?+

Open the directions link to navigate to 41.30629, -72.98279 in Google Maps. The nearest road is Derby Turnpike.

More rockhounding in Connecticut

See all 55 Connecticut spots →

Open Lamberts Mine on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.