Rockhounding in Hunterdon County, New Jersey

5 mapped rockhounding spots in Hunterdon County. Most commonly produces axinite, datolite, actinolite, braunite.

Hunterdon County rockhounding photos

Representative spot and material photos from this county, shown where verified public image records are available.

1 photo

The Riegelsville Bridge over the Delaware River at Riegelsville, Hunterdon County, New Jersey — RiegelsvilleHunterdon County, New Jersey

Minerals reported in Hunterdon County

Axinite2
Datolite2
Actinolite1
Braunite1
Epidote1
Jasper1
Pectolite1
Prehnite1

Standout in Hunterdon County

Hand-picked spot in Hunterdon County, chosen for unusual mineralogy or documented public access. Each card opens the full coordinates and access notes.

Top pick
Riegelsville
Public
Hunterdon County
The Delaware River gravel bars near Riegelsville carry a rounded mix of jasper, quartz, and chalcedony pebbles washed down from Appalachian and Piedmont bedrock upstream. This reach sits above the head of tide at Trenton, so the riverbed is non-tidal public water reachable from state boat-access points. It is a relaxed spot for surface pebble hunting when the river runs low.
Jasper, Quartz

Spots in Hunterdon County

Spot	Minerals	Coordinates	Access
ClintonFrontage Road	Braunite	40.6331, -74.9515	Public
Goat HillGoat Hill Trail	Pectolite Stilpnomelane	40.3458, -74.9374	Permission
Lambertville QuarryDaniel Bray Highway	Axinite Datolite	40.3931, -74.9597	Public
Mt. GilboaDaniel Bray Highway	Axinite Prehnite Epidote Datolite Tourmaline Actinolite Zeolite	40.3898, -74.9562	Public
RiegelsvilleMount Joy Road	Jasper Quartz	40.5938, -75.1835	Public

Neighboring counties in New Jersey

Adjacent rockhounding counties, ranked by how close their centroids sit to Hunterdon County. A natural extension if Hunterdon County is already on your trip plan.

Across the state line from Hunterdon County

Rockhounding counties in neighboring states within driving range. Geology rarely respects state borders — these are often the closest mapped spots you can reach without going deeper into New Jersey.

Hunterdon County FAQ

Where can I rockhound in Hunterdon County, New Jersey?+

RockHoundR tracks 5 rockhounding spots in Hunterdon County. Each entry below has coordinates, mineral notes, and access type. Always confirm local rules before collecting.

What rocks and minerals are common in Hunterdon County?+

Spots in Hunterdon County most often produce Axinite, Datolite, Actinolite, Braunite, Epidote. Individual spots can vary widely.

Are these Hunterdon County rockhounding spots on public land?+

Most spots in this list are tagged public, but access can change with seasons, claims, and local closures. Always verify before driving out — links in the app open the right BLM, USFS, or county pages.

Plan a Hunterdon County rockhounding trip

Open RockHoundR to see these spots on the map alongside land overlays, weather, geology, and your saved finds.