The must-have accompaniment to the Gem Trails series has been revised, updated and expanded. Now pinpointing over 1,300 collection sites for 12 western states using precise GPS coordinates. All the best sites from Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming and newly added Texas are included. Easy-to-use format includes site maps, location photos and a state-by-state overview. 240 pages.