The Secret Lives of Colour

Doodling : How To Master Doodling In 6 Easy Steps

Special Subjects: Basic Color Theory: An Introduction to Color for Beginning Artists

The Complete Color Harmony, Pantone Edition: Expert Color Information for Professional Results

Rocks, Gems, and Minerals

The Science of Color: Understanding the Psychology of Color

Let's Draw Manga: Using Color

Dirt: The Ecstatic Skin of the Earth

Handy Pocket Guide to Asian Gemstones

Field Guide to Rocks & Minerals of Southern Africa

Painting Vibrant Flowers in Watercolor: Revised & Expanded

Rocks and Minerals

Painting Light and Shadow in Watercolor

Foundations of Color

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

Color Index XL: More than 1,100 New Palettes with CMYK and RGB Formulas for Designers and Artists

Modern Rockhounding and Prospecting Handbook

Color Theory For Dummies

Ancient Gems and Finger Rings: Catalogue of the Collection

Register of International Rivers: Prepared by the Centre for Natural Resources, Energy and Transport of the Department of Economic and Social Affairs of the United Nations