A: Ohio is not a hot spot for geodes. ... Another place with geodes in Ohio is an area in the southern parts of the state in Adams and Highland counties. Called the Serpent Mound zinc district, it's home to some geodes containing calcite and barite. Crystal Cave in Ohio is called the world's largest geode.

Where can I find geodes in Ohio?

The best places to search for geodes in Ohio include the Findlay Arch mining district and the Serpent Mound Zinc District in the southern portion of the state. These geodes can potentially contain several minerals including barite, calcite, fluorite, and celestite.

What kind of crystals can you find in Ohio?

Beautiful and colorful crystals of such minerals as calcite, celestite, pyrite, selenite gypsum, and sphalerite, among others, can be found along with small flakes of gold, colorful flint, and rare meteorites and diamonds. Minerals occur in a variety of areas in Ohio in association with sediments or sedimentary rocks.