Where to Find Idocrase in the United States
7 mapped idocrase spots across 5 U.S. states. Idocrase 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 idocrase: properties & identification →Map showing where to find idocrase across the United States, with 7 mapped spots
Top states for idocrase
States ranked by number of idocrase spots in our database. States in bold link to a focused idocrase-in-state list.
Every idocrase spot we track
Sorted by state and county. Coordinates open in Google Maps.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| Rouse HillRouse Hill Road | Riverside County |
| 33.6726, -116.7724 | Public |
| Sparks | Washoe County | 39.5483, -119.6706 | Public | |
| E of MinervaA P Morse Highway | Essex County |
| 43.7766, -73.9465 | Public |
| Amasa Valley | Millard County | 39.1845, -113.3728 | Public | |
| House RangeMiller Canyon Road | Millard County | 39.1635, -113.3730 | Public | |
| Painter SpringPainter Springs Road | Millard County | 39.1851, -113.4420 | Public | |
| Lake WilloughbySouth Trail | Orleans County | 44.7276, -72.0329 | Public |
Idocrase rockhounding FAQ
Where is the best place to find idocrase in the U.S.?+
Utah, California, Nevada have the highest concentrations of idocrase in this list. Each state's quality and access varies — open the linked state pages for a detailed view.
How many idocrase rockhounding spots does RockHoundR track?+
7 mapped spots across 5 states. The app keeps these on a map alongside your private finds.
Can I legally collect idocrase on public land?+
Casual hand collecting of common rocks and minerals like idocrase 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 idocrase in the field?+
Field identification of idocrase 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 idocrase on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
