RockHoundR
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Where to Find Chalcedony

286 mapped chalcedony spots across 43 regions in 2 countries. Pick a region for its local guide, or browse every spot by country below. Chalcedony is the parent name for microcrystalline quartz, including agate, jasper, carnelian, and chrysoprase. Bluish, waxy, translucent chalcedony is a target across the American West, especially in volcanic country.

Top regions for chalcedony

Map showing where to find chalcedony, with 286 mapped spots

Every mapped chalcedony spot

Chalcedony rockhounding FAQ

Where is the best place to find chalcedony?+
Utah, Oregon, Wyoming have the highest concentrations of chalcedony in this list. Quality and access vary by area, so open the linked region pages for a detailed view.
How many chalcedony rockhounding spots does RockHoundR track?+
286 mapped spots across 43 regions in 2 countries. The app keeps these on a map alongside your private finds.
Can I legally collect chalcedony on public land?+
In the U.S., casual hand collecting of common rocks and minerals like chalcedony 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 chalcedony in the field?+
Field identification of chalcedony 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 chalcedony on the map

Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.

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