This is volume three in a series of books that explains with close-up photos the price factors and identifying traits of unusual gems. The stones are shown not only loose but also in jewellery, in the rough, under magnification and as beads. Fun facts, historical anecdotes, geographic sources, gem treatment information, cutting advice, gemstone lighting recommendations, and tips on gem care are included along with diagrams and tables to aid in identification and evaluation. If you are interested in matrix opal, fire agate, blue chalcedony, Paraiba tourmaline, rubellite or other tourmalines, this guide can provide you with jewellery design ideas and in-depth information that will help you be a smart buyer and seller. Written in a succinct and user-friendly style, this is an ideal reference for jewellers, sales associates, appraisers, gem collectors, gemology students, designers gem dealers and consumers.