This book is an educational,yet annoyingly skeptical look at the world of precious and semiprecious minerals.Barbara Walker takes us down the path of hardcore fact,highly accurate in historical and dogmatically scientific terms,yet lacking in any intuitive prowess or feeling for what the title ostensibly calls sacred. It would seem that the only reality according to this book is that which can be proven and sensed directly and objectively,however flawed that system may be.It does however serve as an untainted source of knowledge from the logical perspective.However unnatural and cumbersome it might seem to those who rely on different methods of arriving at truth.This author has no respect for metaphor,and scoffs at spiritual symbolism.I urge the reader to take into account that the knowledge contained in this book is based on reason rather than emotion,and come up with your own interpretations of what is "true" and "false".