Crystal Identifier Author:Peter Darling This book introduces the reader to over 100 crystal varieties, giving a clear and authoritative overview of the value, use, formation, location and distinctive features of each crystal. In addition, boxed features highlight the ancient uses and healing powers attributed to certain crystals. This is an accurate and concise guide to the best-known... more » crystals, such as diamonds, as well as an engrossing introduction to the special qualities of lesser known substances such as orthoclase, an important industrial mineral. Throughout the book full-color photographs illustrate each crystal type, while graphs and diagrams give easy reference to hardness, density and crystal structure.« less