Download or read book Exotic Gems: How to identify and buy tanzanite, ammolite, rhodochrosite, zultanite, sunstone, moonstone and other feldspars written by Renée Newman and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An in-depth, full-color guide to identifying, evaluating, buying and caring for all varieties of tourmaline as well as matrix opal, fire agate and blue chalcedony. The book includes information on their history, nomenclature, geographic sources, use in jewelry, cutting requirements, treatments and imitations.