Where to Find Arsenopyrite
24 mapped arsenopyrite spots across 15 regions. Pick a region for its local guide, or browse every spot by country below. Arsenopyrite is reported at multiple rockhounding spots across the United States. The map below shows where collectors most often find it on legal public ground.
Top regions for arsenopyrite
United States
24 spots · 15 regionsMap showing where to find arsenopyrite, with 24 mapped spots
Every mapped arsenopyrite spot
Arsenopyrite rockhounding FAQ
Where is the best place to find arsenopyrite?+
Idaho, Montana, South Dakota have the highest concentrations of arsenopyrite in this list. Quality and access vary by area, so open the linked region pages for a detailed view.
How many arsenopyrite rockhounding spots does RockHoundR track?+
24 mapped spots across 15 regions. The app keeps these on a map alongside your private finds.
Can I legally collect arsenopyrite on public land?+
In the U.S., casual hand collecting of common rocks and minerals like arsenopyrite 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. Rules differ by country and region, so always check with the managing agency before a trip.
How do I identify arsenopyrite in the field?+
Field identification of arsenopyrite 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 arsenopyrite on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
