Where to Find Prehnite in the United States
21 mapped prehnite spots across 8 U.S. states. Prehnite is reported at multiple rockhounding spots across the United States. The map below shows where collectors most often find it on legal public ground.
Map showing where to find prehnite across the United States, with 21 mapped spots
Top states for prehnite
States ranked by number of prehnite spots in our database. States in bold link to a focused prehnite-in-state list.
Every prehnite spot we track
Sorted by state and county. Coordinates open in Google Maps.
Prehnite rockhounding FAQ
Where is the best place to find prehnite in the U.S.?+
New Jersey, Connecticut, Massachusetts have the highest concentrations of prehnite in this list. Each state's quality and access varies — open the linked state pages for a detailed view.
How many prehnite rockhounding spots does RockHoundR track?+
21 mapped spots across 8 states. The app keeps these on a map alongside your private finds.
Can I legally collect prehnite on public land?+
Casual hand collecting of common rocks and minerals like prehnite is allowed on most BLM and U.S. Forest Service land, with daily and annual limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Always check with the managing agency before a trip.
How do I identify prehnite in the field?+
Field identification of prehnite comes down to color, hardness, fracture, and luster. The RockHoundR app links to geology details for each spot to help narrow down what you might be picking up.
Hunt prehnite on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
