Harrisonville: Amber Rockhounding in Gloucester County, New Jersey

Updated June 2026

Harrisonville is a mapped rockhounding spot in Gloucester County, New Jersey. Reported finds include amber. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Gloucester County
State: New Jersey
Nearest road: Lake Street
Postcode: 08062
Coordinates: 39.68207, -75.26768

Geology at Harrisonville

This spot sits on Lower Member of the Kirkwood Formation, mapped as clay and sand that formed roughly 23 to 16 million years ago. Loose deposits like these are float-collecting ground: erosion keeps moving durable rocks and minerals into gravel bars, cutbanks, and washes.

Mapped unit: Lower Member of the Kirkwood Formation
Age: 23–16 Ma (Early Miocene)
Rock types: clay and sand
Elevation: 110 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 Harrisonville

Best months: March to December. Typical highs run 87°F in midsummer and 41°F in midwinter, with winter lows near 25°F.

Climate normals: NOAA 1991-2020 monthlies, GLASSBORO 2 NE station (10 mi away).

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 Harrisonville

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

Amber Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Harrisonville.

Across the state line from Harrisonville

Harrisonville 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.

Harrisonville FAQ

Where is Harrisonville?+

Harrisonville is in Gloucester County, New Jersey, at 39.68207, -75.26768. Nearest road: Lake Street.

What rocks and minerals can you find at Harrisonville?+

Harrisonville is reported to produce Amber.

Is collecting allowed at Harrisonville?+

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 Harrisonville?+

A rock hammer, sturdy gloves, safety glasses, and a collecting bag cover the basics here. Add a spray bottle: wet rock shows color and pattern that dry rock hides.

When is the best time to visit Harrisonville?+

The most comfortable months at Harrisonville are March to December.

How do I get to Harrisonville?+

Open the directions link to navigate to 39.68207, -75.26768 in Google Maps. The nearest road is Lake Street.

More rockhounding in New Jersey

See all 72 New Jersey spots →

Open Harrisonville on the map

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