A professional geologist and a psychologist take an objective look at crystal healing and share their conclusions in a fascinating and informative book. A Fact-Based Introduction to Crystal Healing Whether you are new to the practice of crystal healing or have a level of experience with it, chances are you have questions: Dan R. Lynch is a professional geologist and the author of many books about rocks and minerals. Julie A. Kirsch is a trained psychologist. Together, they delve into the fascinating study of crystal healing, and they share their answers with you. The book begins with an explanation of what crystal healing is, as well as a simple introduction to the basics of geology/mineralogy.