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![GPS Guide to Western Gem Trails GPS Guide to Western Gem Trails](https://cdn11.bigcommerce.com/s-y0hoh/images/stencil/300w/products/8419/13432/GPS-Guide__48735.1546467500.jpg?c=2)
Gem Trails of Idaho & Western Montana by Lanny Ream is the guide you need for rockhounding in both states! Featuring 99 locations, this book will give you the GPS coordinates, necessary tools, road conditions, maps and photos to help you find some of the northwest regions best rocks!