A look at 294 different rocks, minerals, and gemstones. Each entry describes where the material is found, what it is made of, and how it is used.

Contents: Preface; About the Photography; Introduction; Alphabetical Listing of Minerals. Completely revised and updated, this includes nearly 4,000 entries. Gl

Shows and describes the characteristics of over two hundred gems and minerals

A reference to more than six hundred minerals, with color photographs of each type and an explanation of their forms and properties.