New Mineral Cabinets can now be found at the 
branch libraries in Mendon, Marion, and St. Henry. 

 Facebook Mineral CollectionIn 2006 Ron & Ruth Langsdon donated a substantial part of their personal rare mineral collection to the Mercer County Library in order for future generations to learn and enjoy.  They felt a public library would be an ideal location for all present and future generations.  The collection consists of more than 900 minerals from all over the the world in 21 display cases.
FREE Tours are available for classes, clubs, scouts, schools, college and senior citizens. 
To schedule a tour or school visit-  
Call 419-586-4442 or email
School Mineral Tour Class
Or check out the Prezi below:
(May take some time to load based on internet speed.)