3M Quarry — Rockhounding in Somerset County, New Jersey

3M Quarry is a mapped rockhounding spot in Somerset County, New Jersey. Reported finds include quartz, agate, jasper. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Somerset County
State: New Jersey
Nearest road: Ridge Trail
Coordinates: 40.45828, -74.71350

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 3M Quarry

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 3M Quarry.

Across the state line from 3M Quarry

3M Quarry is close enough to the New Jersey border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

3M Quarry FAQ

Where is 3M Quarry?+

3M Quarry is in Somerset County, New Jersey, at 40.45828, -74.71350. Nearest road: Ridge Trail.

What rocks and minerals can you find at 3M Quarry?+

3M Quarry is reported to produce Quartz, Agate, Jasper.

Is collecting allowed at 3M Quarry?+

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.

How do I get to 3M Quarry?+

Open the directions link to navigate to 40.45828, -74.71350 in Google Maps. The nearest road is Ridge Trail.

More rockhounding in New Jersey

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Open 3M Quarry on the map

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