Where to Find Agate in Missouri

Missouri has 6 mapped collecting spots that report agate, spread across 6 counties. The largest share sits in Benton County County with 1 spot. 6 of the spots are on land mapped as publicly accessible.

Standout agate spots in Missouri

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

Warsaw
Benton County County
Warsaw anchors the southern end of the Benton County mozarkite belt and sits on the Harry S. Truman Reservoir, where falling lake levels expose chert and mozarkite cobbles along the shoreline. The same Burlington and Warsaw limestone weathering that supplies Lincoln also feeds gravels and lakeshores around Warsaw, yielding banded gem chert plus agate and ordinary chert. It is a second strong access point for the state rock, with miles of public shoreline to walk.
Gallatin
Daviess County County
Gallatin sits on the Grand River in glaciated Daviess County, and the river gravels here are a documented source of petrified wood, agate, jasper, and chalcedony reworked from glacial drift. It gives collectors a defined river-access point within the broader northwestern Missouri agate country. Petrified wood is the standout find, with pieces showing clear cell structure.
La Grange
Lewis County County
The Mississippi River gravels around La Grange in Lewis County carry gem-quality agate, chalcedony, jasper, petrified wood, and the occasional Keokuk geode, all concentrated by the river and reworked glacial drift. Older accounts of Missouri minerals single out the large gravel deposits near La Grange as a source of beautiful agate specimens. The mix of Lake Superior agate carried south by glaciers and local silica makes the river bars unusually varied.

Best counties for agate in Missouri

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

Benton County1 spot
Bollinger County1 spot
Cape Girardeau County1 spot
Dade County1 spot
Daviess County1 spot
Lewis County1 spot

Every agate spot we track in Missouri

Sorted by county. Coordinates open in Google Maps.

Spot	County	Minerals	Coordinates	Access
Warsaw	Benton County	Agate Chert Mozarkite	38.1868, -93.3821	Public
Marble Hill E General AreaCounty Road 402	Bollinger County	Agate Petrified Wood	37.2821, -89.9233	Public
Cape Girardeau CountyClark Street	Cape Girardeau County	Agate Petrified Wood	37.3888, -89.6517	Public
GreenfieldEast Dade 114	Dade County	Agate Chert Petrified Wood	37.4162, -93.8310	Public
GallatinPepper Avenue	Daviess County	Agate Chalcedony Jasper Petrified Wood Fossils	39.9193, -93.9405	Public
La GrangeWharf Street	Lewis County	Agate Chalcedony Jasper	40.0469, -91.4958	Public

Before you go

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

Agate in Missouri FAQ

Where can you find agate in Missouri?+

The mapped spots concentrate in Benton County County, Bollinger County County, and Cape Girardeau County County. Every spot on this page appears on the map above with coordinates and access notes.

How many agate spots are mapped in Missouri?+

6 spots across 6 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 agate in Missouri?+

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. 6 of the 6 mapped spots here sit on land marked public. Always confirm current rules with the managing agency before you dig.

Where else to find agate

More minerals to hunt in Missouri

Hunt agate in Missouri 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.