Gemstones of the World is the single, cornerstone volume that every hobbyist, jeweler, jewelry maker, and rockhound needs. And this updated edition... contains a new chapter on the treatment of gemstones, expanded information on what’s “New on the Market,” and 400 additional stones.More than 1,500 full-color photos showcase each precious and semiprecious stone in its rough, natural, polished, and cut renditions. Each entry offers complete information on the gemstone’s formation, structure, physical properties, and characteristics, along with the best methods of working, cutting, and polishing it. There are even full treatments of lesser-known gems; a special section on rocks as precious stones; and organic gem materials. Charts and tables (including the “double fraction” figures that experts want) help collectors identify unknown gemstones and check for genuineness. 

Discover the forces driving the decisions of today's most sought after consumersAccording to recent statistics, members of Generation Y shop 25 percent... to 40 percent more than the average consumer. In Gen BuY, Yarrow and O'Donnell argue that these voracious and fearless consumers have revolutionized the way Americans shop by turning traditional sales and marketing strategies upside down. Based on solid research, the book offers an in-depth look at what motivates these young people to buy certain products and reject others. The authors reveal what makes these consumers tic-how they define power, why they loath manipulation, and why they rely on technology-and show marketers how they can tap into the buying power of this burgeoning group of consumers.Shows what it takes to successfully woe and win young consumers with purchasing powerFilled with surprising insights into the psyche of Gen Y buyersWritten by an expert in consumer research and a well-connected media consumer authorGen Buy is a must-have resource for marketers, advertisers, retailers, and manufacturers who want to understand the new generation of consumers.