The Gem Trails series of guides by James Mitchell stands out as one of the deinitive guides to gems, minerals, fossils, and rocks throughout all of the western states. Each volume by state contains accurate locations and descriptions of many sites within each site. Along with maps and photos of the site, any rockhound should find these guides invaluable. Each contains many full color photos of the gems and minerals that are common to the particular region and state. Gem Trails is available for 9 states, select yours from the drop down menu.