Book: The Book Of Gems Gems have fascinated men and women since the begining of time. Once worn for simple adornment, they soon gained supernatural status because of their colour brilliance and rarity. Gemstones have been valued for their widely believed therapeutic and medicinal values and their association with astrology. The book investigates all these connections and describes the properties of diamonds, various other minerals and organic gemstones, and their location on earth. It provides simple methods to identify and select a good gem and also describes the results of the author's research on gem enhancement, particularly diamonds and rubies and sapphires.