Rocks, Gems, and Minerals of the Rocky Mountains by Garret Romaine (Paperback)

"Rocks, Gems, and Minerals of the Rocky Mountains is a field guide to more than 130 of the most common and sought-after rocks, gems, and minerals hidden throughout the Rocky Mountains. Conveniently sized to fit in your pocket and featuring full-color, detailed photographs, this informative guide makes it easy to identify rocks in your backyard and beyond"-- Provided by publisher.