"Northern California is truly a rock collector's paradise, with terrain and specimens as diversely impressive as they are beautiful. This up-dated and greatly expanded third edition profiles over 100 sites and locations for you to collect in throughout the northern half of the Golden State. Explore coastal beaches, foothills, mountain meadows, and valley plains as well as ghost towns, mining camps and the California Gold Country. All sites list difficulty level, best seasons for visiting, recommended tools, nearby camping, attractions and GPS coordinates. Color photos help identify specimens that can be found and each site has a location map showing collecting areas and the best routes to follow. Regional locator maps and a complete mineral index allow you to explore by region or by specific minerals. Rockhounding adventure awaits along the Gem Trails of Northern California!"--Cover, page 4.