'Author of the excellent The Crystal Bible, Judy Hall is truly a master of her subject and the book is a clever idea well executed.' Paradigm Shift Listing over 1,200 symptoms, this is a practical first-aid guide based on sound crystal-healing principles that have been practiced for millennia. Crystals are a gentle, non-invasive system of holistic healing with no side effects. Suitable for children and animals, they can also benefit your environment and your home.