Rock and Gem Collecting the GPS Way! This handy guide is a complementary book of GPS co-ordinates and more to the popular "Gem Trails of..." series of books and other well-known collecting books which list the best rock mineral and fossil collecting sites for AZ, CA, CO, ID, MT, NV, NM, OR, TX, UT, WA and WY. GPS co-ordinates for over 1360 locations are included plus a Major Waypoints section for major cities and junctions, and lists of national parks and monuments and places of special interest. Government agencies, rock and mineral societies and a comprehensive index make this an indispensable tool for collectors using GPS. Features photos, maps, and a overview of each state's geologic and mining history. Used Book in Good Condition