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.

Standout chalcedony spots in Utah

Hand-picked from the full list below, 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.

Every chalcedony spot we track in Utah

Sorted by county. Coordinates open in Google Maps.

Spot	County	Minerals	Coordinates	Access
Cedar Mountain areaGreen River Cutoff	Emery County	Agate Anhydrite Carnotite Chalcedony Jasper Gypsum Uraninite	39.1599, -110.6158	Public
San Rafael RiverHatts Ranch Road	Emery County	Agate Anhydrite Carnotite Chalcedony Gypsum Jasper Selenite Sulfur	38.9018, -110.3749	Public
San Rafael Swell	Emery County	Agatized Wood Amethyst Carnotite Petrified Wood Agate Chalcedony Chert Petrified Dinosaur Bone +1 more	38.9221, -110.5309	Public
WoodsideDinosaur Diamond Prehistoric Highway	Emery County	Agate Carnotite Chalcedony Chert Petrified Dinosaur Bone Jasper Silicified Wood	39.2016, -110.3346	Public
Circle Cliffs	Garfield County	Agate Chalcedony Jasper Petrified Wood Silicified Wood	37.9962, -111.1291	Permission
AgateCR 179	Grand County	Agate Chalcedony Chert Jasper Opal Opalized Wood Quartz	39.0176, -109.2472	Public
Colorado RiverDinosaur Diamond Prehistoric Highway	Grand County	Agate Chalcedony Chert Jasper Opal Opalized Wood Quartz	38.6027, -109.5841	Public
Miner's BasinMiners Basin Road	Grand County	Actinolite Calcite Chalcedony Chrysocolla Chalcopyrite Fluorite Hematite Malachite +3 more	38.5456, -109.2816	Public
SE Grand County	Grand County	Agate Chalcedony Chert Silicified Dinosaur Bone Petrified Wood	38.6512, -109.5572	Permission
Cedar CityCedar Canyon Road	Iron County	Agate Moss Agate Chalcedony Jasper Petrified Wood	37.6512, -112.9749	Public
Granite MountainIron Springs Road	Iron County	Actinolite Albite Amethyst Azurite Apatite Barite Chalcedony Cinnabar +5 more	37.7340, -113.2350	Public
Drum MountainsRough Well Road	Juab County	Agate Jasper Pyrolusite Rhodochrosite Chalcedony Chalcopyrite Cuprite Galena +6 more	39.5711, -113.0359	Public
Dugway Range	Juab County	Beryl Chalcedony Fluorite Garnet Topaz	39.8944, -113.0802	Public
Spor MountainEagle Rock	Juab County	Fluorite Bertrandite Carnotite Chalcedony Chalcopyrite Hematite Magnetite Pyrite +1 more	39.7588, -113.1974	Public
Thomas Range	Juab County	Agate Beryl Chalcedony Fluorite Garnet Opal Quartz Topaz	39.7211, -113.1351	Public
Topaz Dome Quarry	Juab County	Beryl Calcite Bixbyite Carnelian Carnotite Chalcedony Fluorite Garnet +5 more	39.6966, -113.0987	Permission
Kitchen Corral Wash	Kane County	Barite Calcite Chalcedony Limonite Pyrolusite	37.1358, -112.0934	Permission
Dog Valley	Millard County	Chalcedony Fluorite	38.6648, -112.5798	Public
Little Drum Mountains	Millard County	Azurite Cuprite Chalcedony Chalcopyrite Malachite Pyrite Pyrolusite Rhodochrosite +1 more	39.4625, -113.0303	Public
Sevier Lake	Millard County	Chalcedony Galena Garnet Molybdenite	39.0166, -113.2891	Public
Henry mining districtFlat Top Road	Sevier County	Hematite Limonite Pyrolusite Magnetite Thorium Fluorite Apatite Albite +8 more	38.5246, -112.2399	Public
Clifton mining district	Tooele County	Agate Azurite Dolomite Malachite Garnet Rutile Bornite Calcite +6 more	40.1710, -113.8127	Public
Dugway mining district	Tooele County	Agate Amethyst Apatite Fluorite Chalcedony Garnet Topaz Cerussite +7 more	39.9975, -113.1860	Public
Sweet Water CanyonBitter Creek Road	Uintah County	Agate Chalcedony Jasper Petrified Wood	39.8397, -109.4128	Public
FairfieldLewiston Road	Utah County	Chalcedony Chert Limonite Pyrite Quartz Variscite Fossils	40.2736, -112.1452	Public

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 appears on the map above with coordinates and access notes.

How many chalcedony spots are mapped in Utah?+

25 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. 21 of the 25 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

RockHoundR puts these spots on an offline map with BLM and Forest Service overlays, geology layers, and a log for your finds.

Standout chalcedony spots in Utah

San Rafael Swell

Dugway Range

Spor Mountain

Topaz Dome Quarry