Where to Find Chalcedony in Colorado
Colorado has 5 mapped collecting spots that report chalcedony, spread across 3 counties. The largest share sits in Mineral County with 3 spots. 3 of the spots are on land mapped as publicly accessible, and 1 is a fee-dig site.
Every chalcedony spot we track in Colorado
Best spotDel Norte Thunder Egg BedsSaguache County, ColoradoPublic access · Plume Agate, Moss Agate, Chalcedony +2
Last Chance MineMineral County, ColoradoFee dig · Amethyst, Agate, Chalcedony +7- Willow Creek (permission required)Mineral County, ColoradoPermission required · Amethyst, Chalcedony, Sphalerite +2
Wolf Creek Stream BedMineral County, ColoradoPublic access · Amethyst Geode, Agate, Chalcedony +2- Austin BluffsEl Paso County, ColoradoPublic access · Agate, Carnelian, Chalcedony +1
Standout chalcedony spots in Colorado
Hand-picked from the full list above, with the reason each one earns a trip.
Best counties for chalcedony in Colorado
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 Colorado FAQ
Where can you find chalcedony in Colorado?+
The mapped spots concentrate in Mineral County, El Paso County, and Saguache 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 Colorado?+
5 spots across 3 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 Colorado?+
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. 3 of the 5 mapped spots here sit on land marked public, and 1 is a fee-dig operation where you pay for access and keep what you find. Always confirm current rules with the managing agency before you dig.
Where else to find chalcedony
More minerals to hunt in Colorado
Hunt chalcedony in Colorado 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.
