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
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 | Public |
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
- Gloucester County~42 mi5 spotsTop: Amber, Fossils
- Monmouth County~43 mi3 spotsTop: Quartz, Amber, Fossils
- 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.
