"19 Big Secrets About Astro Gems" is a book about gem crystals in the context of an ancient system of astrology--the science of jyotish, which has existed in India since Vedic times, extending back at least 5,000 years. The authors, Dr. Heinz Krug and Dr. Robert Thurston, with a background in both the physical sciences and Sanskrit studies, have made an extensive study of jyotish and bring out that it correlates with cutting-edge studies in physics...