Best Rockhounding in Illinois: Where to Go What to Find
Hamilton is also among the best rockhounding locations in northern Illinois. In the area gravels, explorers might find agate, jasper, and chalcedony geodes. The gravels south of Keokuk Bridge are also famous for their geode specimens. At the Hamilton Quarry, the top strata, you can also find sphalerite, calcite, pyrite, and marcasite geode ...
