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From agate to zeolite, Gem Trails of Oregon includes detailed maps and information to guide collectors to more than 80 of the best rockhounding locations in the state. Color and black & white photos highlight collecting areas and the specimens that can be found there. Mitchell, 192 pages, ISBN 0-935182-99-3
We've been to some of the places in this book and found exactly what we were looking for. If you're just getting into rockhounding and gem hunting, or even well experienced, this is a great guide to Oregon.