Great South / Book Catalog / Gems & Minerals Pockets: GEMSTONES A Dorling Kindersley Pocket Book Written by Emma Foa GREAT VALUE Pockets: GEMSTONES Pocket Book - $6.95 Item - B154 Why are emeralds green? How does a pearl form?  What is the "king of gems"? The answers to these questions and many more are packed within the pages of this 4" x 5" book. D K Pockets: Gemstones is a fascinating guide to the better-known varieties of precious stones, ranging from uncut gems to spectacular examples of finished jewelry, all superbly photographed in full color. Featuring an easy to use color key, information on gem lore, gem care, and how to make your own jewelry, D K Pockets: Gemstones is the ideal introduction to a multifaceted, glittering world.