Gem Trails of Colorado Author:James R. Mitchell This fully revised and updated edition features over 90 of the best locales for exploring and collecting rocks, minerals or fossils throughout Colorado. Sites are presented with detailed directions, site maps, descriptive text and numerous black and white photos. A handy mineral locator index, glossary, lists of rock clubs and a full-color photo... more » insert of rock fossil and mineral specimens are included to enhance the collecting experience.« less