Artificial gemstones have been well established in the trade for some time, but with further refinements in their manufacture, gemmologists worldwide are facing increasing problems with identification. In Artificial Gemstones, Michael O'Donoghue provides the definitive guide to the various manmade substitutes, thus enabling anyone handling gems to identify them accurately. Starting with the theory of synthetic gem manufacture and an explanation of the production methods used for growing and/or improving crystals, the book moves on to list and identify the materials themselves. The author lists the internal and external features and tests, and the book contains color illustrations to display the inclusions found in transparent materials. The book is completed by an extensive bibliography and a useful appendix of trade names.