Rockhounding in Monmouth County, New Jersey
6 mapped rockhounding spots in Monmouth County. Most commonly produces fossil, shark tooth, belemnite, quartz.
Every rockhounding spot in Monmouth County
Best spotBig Brook ParkMonmouth County, New JerseyPublic access · Shark Tooth, Belemnite, Fossil
Best spotPoricy Park Fossil BedsMonmouth County, New JerseyPublic access · Belemnite, Shark Tooth, Fossil
Best spotRamanessin BrookMonmouth County, New JerseyPublic access · Shark Tooth, Fossil
Best spotShark RiverMonmouth County, New JerseyPublic access · Shark Tooth, Fossil
ManasquanMonmouth County, New JerseyPublic access · Quartz, Fossil, Petrified Wood- Long BranchMonmouth County, New JerseyPublic access · Quartz
Monmouth County rockhounding photos
Representative spot and material photos from this county, shown where verified public image records are available.
Minerals reported in Monmouth County
Standouts in Monmouth County
Hand-picked spots in Monmouth County, chosen for unusual mineralogy or documented public access. Each card opens the full coordinates and access notes.
- Top pick
Shark River
Public accessMonmouth County
Shark River is named for the fossil shark teeth found where it cuts middle Eocene marine beds, notably the Shark River and Manasquan formations, roughly 45 million years old.
Shark Tooth, Fossil
- Top pick
Big Brook Park
Public accessMonmouth County
Big Brook is New Jersey's best known free fossil stream, cutting Late Cretaceous marine beds of the Navesink Formation that are roughly 70 million years old.
Shark Tooth, Belemnite, Fossil
- Top pick
Poricy Park Fossil Beds
Public accessMonmouth County
Poricy Brook exposes the same Late Cretaceous Navesink Formation as nearby Big Brook, and its fossil beds are among the most accessible in the state.
Belemnite, Shark Tooth, Fossil
- Top pick
Ramanessin Brook
Public accessMonmouth County
Ramanessin Brook is a quieter alternative to Big Brook and Poricy, draining the same Late Cretaceous Monmouth Group marine sequence in Holmdel.
Shark Tooth, Fossil
Neighboring counties in New Jersey
Adjacent rockhounding counties, ranked by how close their centroids sit to Monmouth County. A natural extension if Monmouth County is already on your trip plan.
- Hudson County~31 mi4 spotsTop: Amethyst, Common Opal, Fire Opal
- Somerset County~31 mi9 spotsTop: Quartz, Agate, Prehnite
- Mercer County~38 mi5 spotsTop: Calcite, Amber, Axinite
- Burlington County~45 mi3 spotsTop: Amber, Clear Agate, Jasper
- Morris County~48 mi11 spotsTop: Pyrite, Apatite, Chalcopyrite
- Hunterdon County~49 mi5 spotsTop: Axinite, Datolite, Actinolite
Across the state line from Monmouth 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.
- Bucks County~48 miPennsylvania · 6 spotsTop: Petrified Wood, Jasper, Agate
- Suffolk County~73 miNew York · 1 spotTop: Almandine Garnet, Jasper, Quartz
- Delaware County~73 miPennsylvania · 8 spotsTop: Quartz, Amethyst, Feldspar
- Orange County~74 miNew York · 5 spotsTop: Bloodstone, Arsenopyrite, Blue Corundum
Monmouth County FAQ
Where can I rockhound in Monmouth County, New Jersey?+
What rocks and minerals are common in Monmouth County?+
Are these Monmouth County rockhounding spots on public land?+
Plan a Monmouth County rockhounding trip
Open RockHoundR to see these spots on the map alongside land overlays, weather, geology, and your saved finds.
