Rockhounding in Hancock County, Illinois
9 mapped rockhounding spots in Hancock County. Most commonly produces geode, calcite, pyrite, quartz.
Every rockhounding spot in Hancock County
Best spotHamiltonHancock County, IllinoisPublic access · Agate, Jasper, Geode
Best spotNiotaHancock County, IllinoisPublic access · Fossil, Geode
Crystal Glen CreekHancock County, IllinoisPublic access · Geode, Barite, Calcite +5
Spillman CreekHancock County, IllinoisPublic access · Geode, Pyrite, Chalcedony +2
Hamilton QuarryHancock County, IllinoisPublic access · Geode, Pyrite, Calcite +1
Dallas CityHancock County, IllinoisPublic access · Geode, Calcite, Malachite
Mississippi River (near Hamilton)Hancock County, IllinoisPublic access · Geode, Amethyst, Quartz
NauvooHancock County, IllinoisPublic access · Geode
Tyson CreekHancock County, IllinoisPublic access · Geode
Hancock County rockhounding photos
Representative spot and material photos from this county, shown where verified public image records are available.
Standouts in Hancock County
Hand-picked spots in Hancock County, chosen for unusual mineralogy or documented public access. Each card opens the full coordinates and access notes.
Top pickHamilton
Public accessHancock County
Hamilton lies on the Mississippi River within the Keokuk geode bed, a Lower Mississippian (Warsaw Formation) zone regarded as one of the finest quartz-geode localities on Earth.
Agate, Jasper, Geode
Top pickNiota
Public accessHancock County
Niota anchors the eastern edge of the Hancock County geode country, where creeks cross county roads and expose Warsaw Formation geodes weathering out of the outcrop.
Fossil, Geode
Neighboring counties in Illinois
Adjacent rockhounding counties, ranked by how close their centroids sit to Hancock County. A natural extension if Hancock County is already on your trip plan.
Across the state line from Hancock County
Rockhounding counties in neighboring states within driving range. Geology rarely respects state borders. These are often the closest mapped spots you can reach without going deeper into Illinois.
