Where to Find Prehnite in New Jersey
New Jersey has 9 mapped collecting spots that report prehnite, spread across 5 counties. The largest share sits in Somerset County with 4 spots. 9 of the spots are on land mapped as publicly accessible.
Every prehnite spot we track in New Jersey
Pompton LakesPassaic County, New JerseyPublic access · Banded Agate, Amethyst, Barite +12- Prospect Park QuarryPassaic County, New JerseyPublic access · Banded Agate, Amethyst, Barite +12
- Bound BrookSomerset County, New JerseyPublic access · Agate, Bornite, Calcite +8
- Rock Hill QuarrySomerset County, New JerseyPublic access · Albite, Chalcocite, Chrysocolla +6
- Mt. GilboaHunterdon County, New JerseyPublic access · Axinite, Prehnite, Epidote +4
- HopewellSomerset County, New JerseyPublic access · Calcite, Stilbite, Prehnite +3
- Houdaille QuarryUnion County, New JerseyPublic access · Agate, Prehnite, Amethyst
- KingstonSomerset County, New JerseyPublic access · Agate, Prehnite, Quartz
- Morris CountyMorris County, New JerseyPublic access · Prehnite
Best counties for prehnite in New Jersey
Ranked by the number of mapped prehnite spots. County links open the full rockhounding page for that county.
Before you go
Read the prehnite identification guide so you know what a keeper looks like in the field: Prehnite in the encyclopedia.
Prehnite in New Jersey FAQ
Where can you find prehnite in New Jersey?+
The mapped spots concentrate in Somerset County, Passaic County, and Hunterdon County. Every spot on this page is on the map, and each spot's own page has its coordinates and access notes.
How many prehnite spots are mapped in New Jersey?+
9 spots across 5 counties. The RockHoundR app keeps the same spots on an offline map with public land overlays, geology layers, and your saved finds.
Is it legal to collect prehnite in New Jersey?+
Hand collecting of common rocks and minerals in small amounts for personal use is generally allowed on BLM and U.S. Forest Service land, with limits set by the local field office. National parks, most state parks, and tribal land are closed to collecting. 9 of the 9 mapped spots here sit on land marked public. Always confirm current rules with the managing agency before you dig.
Where else to find prehnite
More minerals to hunt in New Jersey
Hunt prehnite in New Jersey with the map in your pocket
RockHoundR puts these spots on an offline map with BLM and Forest Service overlays, geology layers, and a log for your finds.
