Gem

National Geographic Pocket Guide to Trees and Shrubs of North America

Lake Superior Agates Field Guide (Rocks & Minerals Identification Guides)

The Ultimate Guide to Sea Glass: Finding, Collecting, Identifying, and Using the Ocean's Most Beautiful Stones

Rockhounding Idaho: A Guide to the State's Best Rockhounding Sites (Rockhounding Series)

Wild Clay: Creating ceramics and glazes from natural and found resources

Gem Trails of Oregon

The Practical Geologist: The Introductory Guide to the Basics of Geology and to Collecting and Identifying Rocks

Rockhounding Montana: A Guide to 100 of Montana's Best Rockhounding Sites (Rockhounding Series)

Simon & Schuster's Guide to Rocks & Minerals