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 County with 4 spots. 9 of the spots are on land mapped as publicly accessible.
Map of 9 prehnite collecting spots in New Jersey
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.
Every prehnite spot we track in New Jersey
Sorted by county. Coordinates open in Google Maps.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| Mt. GilboaDaniel Bray Highway | Hunterdon County |
| 40.3898, -74.9562 | Public |
| Morris CountyCayuga Avenue | Morris County | 40.9360, -74.5232 | Public | |
| Pompton LakesI 287 | Passaic County | 41.0054, -74.3071 | Public | |
| Prospect Park QuarryNorth 16th Street | Passaic County | 40.9404, -74.1748 | Public | |
| Bound BrookFire Road | Somerset County | 40.5890, -74.5678 | Public | |
| HopewellLong Hill Road | Somerset County | 40.4578, -74.7207 | Public | |
| KingstonGeorgetown-Franklin Turnpike | Somerset County | 40.3971, -74.6095 | Public | |
| Rock Hill QuarryGeorgetown-Franklin Turnpike | Somerset County | 40.3969, -74.6168 | Public | |
| Houdaille QuarryPhillipsburg-Newark Expressway | Union County | 40.7100, -74.3348 | Public |
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 County, Passaic County County, and Hunterdon County County. Every spot on this page appears on the map above with 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.
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.
