The Gemstones Encyclopedia describes over 500 types and 2220 varieties of gems, gem-stones, colored ornamental stones, organic and man-made jewelry materials with 416 color photos, providing 8500 names and synonyms. Some of 6000 deposits and occurrences of gemstones are mentioned in the text. A complete list of deposits for 145 countries of the world, including over 2000 localities for Russia and bordering countries. Such an inventory of gemstone as of the end of the XX century is published first time ever and expected to be a valuable reference tool for the gemological community. The tables of appendices there are list over 850 large crystals of gemstones including nuggets of gold, as well as unique cut gems. Commercial names of gem-stone-quality varieties of quartz, jades, catís eye stones, and natural resins are also listed. Provided are tables of refraction and other optical parameters of gemstones, as well as tables of not metric units of weight and length for precious stones. Of interest for a wide range of readers is the Gemstone Chronology showing history of gemstone discovery and processing from antiquity to the present day. The general and additional indexes facilitate the search for the needed information in the text.
The Encyclopedia is expected to provide new inputs to all those interested in gemstones. Gemologists can be attracted by information on ornamental and decorative characteristics and sources of gemstones, state-of-the-art technologies of gemstone imitation, and various man-made materials. Geologists and mineralogists will find the information useful in prospecting of gemstone occurrences, comprehensive use of mineral deposits, and search for gemstone varieties so far unknown in their countries. Art critics and jewelers will be provided numerous examples of application of gemstones in unique masterpieces and works of art.