Rock and Gem Collecting the GPS Way! This handy guide is a complementary book of GPS coordinates and more to the popular Gem Trails 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 coordinates 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.