GeoFair is the name for the "Cincinnati Gem, Mineral, Fossil, Lapidary and Jewelry Show." Over the years this name has grown, as well as the show itself.

The show is the production of the Cincinnati Mineral Society and the Cincinnati Dry Dredgers, with much appreciated help from the University of Cincinnati Geology Dept, Miami University, the Lapidary Society and the Cincinnati Museum of Natural History and Science.