"A Guide to Illinois Rocks and Minerals" is written by authors from the Illinois State Geological Survey. This book is a comprehensive and informative encyclopedia that introduces the reader to the unique properties and origins of the various types of rocks and minerals found in Illinois. Thanks to multifunctional illustrations and detailed descriptions, the reader has the opportunity to learn more deeply about the world of the geological component of the nature of the region, to expand his knowledge and skills in the field of geology and mineralogy. A Guide to the Rocks and Minerals of Illinois will be an excellent addition to all curious persons who are interested in the natural sciences and desire to deepen their knowledge of the geology of this remarkable region.