Gemstones and the Environment

Rocks, Gems, and Minerals

Forces in Action

Field Guide to Rocks & Minerals of Southern Africa

Deserts

Dirt: The Ecstatic Skin of the Earth

Air and Flight

Rocks and Minerals

Coal

Handy Pocket Guide to Asian Gemstones

Wood and the Environment

Blue: The Science and Secrets of Nature's Rarest Color

Flowers and Seeds

Rockhounding Idaho: A Guide to 99 of the State’s Best Rockhounding Sites

Textiles and the Environment

Modern Rockhounding and Prospecting Handbook

Rainforests

Ancient Gems and Finger Rings: Catalogue of the Collection

Metals and the Environment

The Science of the Earth: The Secrets of Our Planet Revealed