Where to Find Hyalite Opal in the United States
7 mapped hyalite opal spots across 5 U.S. states. Hyalite Opal 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 hyalite opal across the United States, with 7 mapped spots
Top states for hyalite opal
States ranked by number of hyalite opal spots in our database. States in bold link to a focused hyalite opal-in-state list.
Every hyalite opal spot we track
Sorted by state and county. Coordinates open in Google Maps.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| BeltsvilleBay Hill Drive | Prince George's County |
| 39.0646, -76.9285 | Public |
| Mount BlackmoreBlackmore Trail | Gallatin County |
| 45.4447, -111.0035 | Public |
| CoaldaleVeterans Memorial Highway | Esmeralda County | 38.0299, -117.8794 | Public | |
| Deer Park MineDeer Park Lake Road | Mitchell County | 35.9330, -82.1050 | Public | |
| DanburySheppard Mill Road | Stokes County | 36.4083, -80.2000 | Public | |
| Island CreekTungsten Mine Road | Vance County |
| 36.5050, -78.4765 | Public |
| Opal Butte | Morrow County |
| 45.0437, -119.6134 | Permission |
Hyalite Opal rockhounding FAQ
Where is the best place to find hyalite opal in the U.S.?+
North Carolina, Maryland, Montana have the highest concentrations of hyalite opal in this list. Each state's quality and access varies — open the linked state pages for a detailed view.
How many hyalite opal 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 hyalite opal on public land?+
Casual hand collecting of common rocks and minerals like hyalite opal 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 hyalite opal in the field?+
Field identification of hyalite opal 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 hyalite opal on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
