Where to Find Plagioclase in the United States
5 mapped plagioclase spots across 3 U.S. states. Plagioclase is reported at multiple rockhounding spots across the United States. The map below shows where collectors most often find it on legal public ground.
Learn about plagioclase: properties & identification →Map showing where to find plagioclase across the United States, with 5 mapped spots
Top states for plagioclase
States ranked by number of plagioclase spots in our database. States in bold link to a focused plagioclase-in-state list.
Every plagioclase spot we track
Sorted by state and county. Coordinates open in Google Maps.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| Decaturville CraterLilac Rd | Laclede County | 37.8930, -92.7085 | Public | |
| Tunk CreekKeystone Road | Okanogan County |
| 48.5615, -119.4866 | Public |
| Big Falls ParkBig Falls Forest Road | Eau Claire County |
| 44.8210, -91.2936 | Public |
| General AreaState Highway 182 | Iron County |
| 46.0834, -89.9912 | Public |
| Dresser Trap Rock QuarryEast Avenue North | Polk County |
| 45.3790, -92.6297 | Public |
Plagioclase rockhounding FAQ
Where is the best place to find plagioclase in the U.S.?+
Wisconsin, Missouri, Washington have the highest concentrations of plagioclase in this list. Each state's quality and access varies — open the linked state pages for a detailed view.
How many plagioclase rockhounding spots does RockHoundR track?+
5 mapped spots across 3 states. The app keeps these on a map alongside your private finds.
Can I legally collect plagioclase on public land?+
Casual hand collecting of common rocks and minerals like plagioclase 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 plagioclase in the field?+
Field identification of plagioclase 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 plagioclase on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
