With a million copies in print, here comes an even larger, more up-to-date version of the most complete reference book ever published on the subject. All the gemstones ever discovered are treated in their many variations. More than 1,500 full-color photos showcase each precious and semiprecious stone in all its singular glory--in both its rough natural state and its polished and cut renditions. Each entry offers complete information on a gemstone's formation and structure, physical properties and characteristics, methods of working, cutting, and polishing. Learn about the best known, including amethyst and diamond. Find full treatments of lesser-known gems, from andalusite to vesuvian. A special section is devoted to rocks as precious stones, including alabaster, onyx, obsidian, and fossils. Organic gem materials are also covered, such as coral, ivory, amber, and pearl, plus new on the market stones like charcoite. Everything is covered, including imitations, synthetics, and combined stones. Charts and tables help you identify unknown gemstones and, when you're in the market, how to check for genuineness. This is truly the ultimate one-volume book every hobbyist, jeweler, jewelry maker and rockhound will ever need Invaluable to rockhounds of all ages.--Science Teacher. One of the 100 outstanding Sci-Tech books of the year.--Library Journal. Anyone interested in minerals and gems will want a copy of this beautifully-illustrated book.--Science Books & Films.
Full-color illustrations of all gemstones and hundreds of semi-precious stones accompany guidelines for identification and classification and articles on mining, cutting, and the properties and characteristics of each
"Guide to the identification and properties of precious and semiprecious gems, novelty stones, agates and crystals.
"Gems and Gemstones" features nearly 300 color images of cut gems, precious and semiprecious stones, gem-quality mineral specimens, and fine jewelry to be unveiled in the new Grainger Hall of Gems at the Field Museum in Chicago.
The clearest and cleanest-cut photographic field guide to over 130 gemstones from around the world This compact visual guide is packed with more than 800 vivid full-colour photographs of more than 130 varieties of cut and uncut stones, ...
Gemstones of the World
Shows and describes different kinds of rocks and minerals, and tells how to identify rocks by testing for hardness, streak color, and density
Spinel's name is derived from the Italian word spinella (“little thorn”), from the Latin word for “thorn” (spina), which alludes to the fact that its characteristic octahedral crystals have pointed ends. Properties and characteristics: ...
This exceptionally extravagant book is a picture-packed, fact-filled celebration guaranteed to bring sparkle to your life and your library.
In this book, the author expounds on how they were formed, why they altered, why they became the cradles of precious gemstones, how they are categorized, and how they are now exploited by man. What initiates the growth of gemstones?
It is only in the last few centuries that advances in science and the understanding of chemistry, composition, and geological processes have allowed for the synthesis of gemstones. Today the use of imitations and synthetics is ...