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Where to Find Chalcedony in Utah

Utah chalcedony shows up across the western deserts and the volcanic country of the Mineral Mountains and Wah Wah ranges. The Dugway geode beds in the Thomas Range yield hollow chalcedony nodules with quartz druse interiors, the best of them carrying blue and gray banding. The Black Rock Desert in Millard County produces small white and gray chalcedony rosettes weathered from rhyolite, and the Topaz Mountain area in Juab County turns up clear chalcedony coatings on the topaz-bearing tuff. Surface float of pale gray and white chalcedony is common on the dry lake margins south of Delta.

Spot list checked against source data on April 1, 2026.

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Every chalcedony spot we track in Utah

Standout chalcedony spots in Utah

Hand-picked from the full list above, with the reason each one earns a trip.

Best counties for chalcedony in Utah

Ranked by the number of mapped chalcedony spots. County links open the full rockhounding page for that county.

Before you go

Read the chalcedony identification guide so you know what a keeper looks like in the field: Chalcedony in the encyclopedia.

Chalcedony in Utah FAQ

Where can you find chalcedony in Utah?+
The mapped spots concentrate in Juab County, Emery County, and Grand County. Known collecting areas include Dugway geode beds (Juab County), Black Rock Desert (Millard County), and Topaz Mountain area (Juab County). Every spot on this page is on the map, and each spot's own page has its coordinates and access notes.
How many chalcedony spots are mapped in Utah?+
29 spots across 11 counties. The RockHoundR app keeps the same spots on an offline map with public land overlays, geology layers, and your saved finds.
Is it legal to collect chalcedony in Utah?+
Hand collecting of common rocks and minerals in small amounts for personal use is generally allowed on BLM and U.S. Forest Service land, with limits set by the local field office. National parks, most state parks, and tribal land are closed to collecting. 24 of the 29 mapped spots here sit on land marked public. Always confirm current rules with the managing agency before you dig.

Where else to find chalcedony

More minerals to hunt in Utah

Hunt chalcedony in Utah with the map in your pocket

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