This unique book examines the basic scientific principles underpinning the fascinating art of crystal healing. Presented in a simple, easy-to-read style, this comprehensive book will provide the key to anyone seeking to unlock the powerful healing properties of crystals.The result of twelve years research and personal study, author Michael Gienger presents here an exhaustative examination of the proven therapeutic and healing properties of crystals for all our spiritual, mental and physical needs. Containing a wealth of stunning colour photography and detailed descriptions of crystals and their application, this ground-breaking work provides the first ever comprehensive survey of the science and art of crystal healing.