Rock Hill Quarry: Albite & Chalcocite Rockhounding in Somerset County, New Jersey

Updated June 2026

Rock Hill Quarry is a mapped rockhounding spot in Somerset County, New Jersey. Reported finds include albite, chalcocite, chrysocolla, galena, goethite, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Somerset County
State: New Jersey
Nearest road: Georgetown-Franklin Turnpike
Postcode: 08528
Coordinates: 40.39691, -74.61681

Geology at Rock Hill Quarry

This spot sits on Passaic Formation, mapped as siltstone 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: Passaic Formation
Age: 235–175 Ma (Late Triassic to Early Jurassic)
Rock types: siltstone
Elevation: 70 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 Rock Hill Quarry

Best months: March to November. Typical highs run 86°F in midsummer and 39°F in midwinter, with winter lows near 23°F.

Climate normals: NOAA 1991-2020 monthlies, WERTSVILLE 4 NE station (9 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 Rock Hill 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 Rock Hill Quarry.

Across the state line from Rock Hill Quarry

Rock Hill 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.

Rock Hill Quarry FAQ

Where is Rock Hill Quarry?+

Rock Hill Quarry is in Somerset County, New Jersey, at 40.39691, -74.61681. Nearest road: Georgetown-Franklin Turnpike.

What rocks and minerals can you find at Rock Hill Quarry?+

Rock Hill Quarry is reported to produce Albite, Chalcocite, Chrysocolla, Galena, Goethite, Malachite, Prehnite, Quartz, Tourmaline.

Is collecting allowed at Rock Hill 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.

What tools should I bring to Rock Hill Quarry?+

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 Rock Hill Quarry?+

The most comfortable months at Rock Hill Quarry are March to November.

How do I get to Rock Hill Quarry?+

Open the directions link to navigate to 40.39691, -74.61681 in Google Maps. The nearest road is Georgetown-Franklin Turnpike.

More rockhounding in New Jersey

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Open Rock Hill Quarry on the map

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