Rockhounding in Mercer County, New Jersey
5 mapped rockhounding spots in Mercer County. Most commonly produces calcite, amber, axinite, black jasper.
Map showing 5 rockhounding spots in Mercer County, New Jersey
Minerals reported in Mercer County
Spots in Mercer County
| Spot | Minerals | Coordinates | Access |
|---|---|---|---|
| Belle MountainValley Road | 40.3360, -74.9249 | Public | |
| Crosswick’s CreekLongwood Drive | 40.1666, -74.6706 | Public | |
| LambertvilleRiver Road | 40.3236, -74.9120 | Public | |
| Pennington MountainWoodsville Road | 40.3616, -74.8063 | Public | |
| Washington Crossing State ParkBlue Dot Trail | 40.3093, -74.8642 | Permission |
Neighboring counties in New Jersey
Adjacent rockhounding counties, ranked by how close their centroids sit to Mercer County. A natural extension if Mercer County is already on your trip plan.
- Hunterdon County~15 mi5 spotsTop: Axinite, Datolite, Actinolite
- Burlington County~20 mi3 spotsTop: Amber, Clear Agate, Jasper
- Somerset County~21 mi9 spotsTop: Quartz, Agate, Prehnite
- Monmouth County~38 mi6 spotsTop: Fossil, Shark Tooth, Belemnite
- Gloucester County~42 mi5 spotsTop: Amber, Fossil
- Morris County~44 mi11 spotsTop: Pyrite, Apatite, Chalcopyrite
Across the state line from Mercer 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.
Mercer County FAQ
Where can I rockhound in Mercer County, New Jersey?+
RockHoundR tracks 5 rockhounding spots in Mercer County. Each entry below has coordinates, mineral notes, and access type. Always confirm local rules before collecting.
What rocks and minerals are common in Mercer County?+
Spots in Mercer County most often produce Calcite, Amber, Axinite, Black Jasper, Celadonite. Individual spots can vary widely.
Are these Mercer 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 Mercer County rockhounding trip
Open RockHoundR to see these spots on the map alongside land overlays, weather, geology, and your saved finds.
