Scrying is the art of divining by looking into an appropriate surface and receiving visions. It has been used by healers, shamans and witch doctors since ancient times. In this book titled "Crystal Ball", Sibyl Ferguson offers a concise and accurate account of the history and art of using crystal balls or "shewstones" as they were called in the bible, as tools to improve daily life. This revised and expanded editions includes additional guidance for care of crystals and gemstones as well as information on using them for healing and protection. hardcover 82 pages.