"In this ultimate guide to crystals and how to use them, Hall draws on over 30 years' experience in crystal healing to provide an essential addition to the library of anyone working with crystals. Lavishly illustrated, organized by crystal color for easy reference, this gorgeous guide features newly discovered stones and new material on geology and fluorescent properties. Hall relates the colors of crystals to the chakras, explains how to cleanse and activate them, and provides helpful, authoritative advice on using them to heal. 288 pp."