A wonderful overview and site specific guide to exploring over 65 locales throughout California that illustrate the dynamic geology of the state: from lava tubes and bubbling mud pots, to erupting geysers and creeping landslides; graphically illustrated, with color photos, maps, glossary and explanatory text.

Crystals are all around us — in our plants, our homes, and even in our bodies!

Two renowned experts share their passion for geodes and their formation.

A simplified pocket field guide to common gems, ores and other rocks and minerals. Color photos and concise descriptions introduce beginners to the subject.

The definitive guide to rocks and minerals, completely updated for the fifth edition, includes 385 color photographs showing rocks, minerals, and geologic formations.

GPS co-ordinates for over 1360 locations are included plus a Major Waypoints section for major cities and junctions, and lists of national parks and monuments and places of special interest.

Revised and expanded of this popular reference guide for rockhounds and field collectors of rocks, minerals and fossils.