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Welcome to the C.M.S.

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The Cincinnati Mineral Society - CMS - is an all volunteer organization that seeks to educate, promote and further the science and hobby of geology, mineral collecting, as well as an appreciation for fossils and gems.

We primarily serve southwest Ohio, and neighboring Kentucky and Indiana.

Each year, the CMS hosts a three day event of professionals and hobbyists  - Geofair a Gem, Mineral and Fossil Show featuring respected dealers and displays from collectors.

Take the time to explore this website and decide to join fellow enthusiasts and become a member of the CMS. 


American Federation                         Midwest Federation of

of Mineralogical Societies                 Mineralogical & Geological Societies


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