Gems of the World - Tapa dura

A comprehensive, up-to-date and beautifully illustrated reference.

This new book is a practical, comprehensive guide to the identification and use of precious and semi-precious gems, novelty stones, agates and crystals. Presenting the latest information on the gemstone industry, with an extensive section on ethical mining, conflict diamonds, and the emergence of new diamond centers, Gems of the World is a completely up-to-date reference for gemologists, rock hounds and general readers.

Cally Oldershaw clearly explains the geology, chemistry and properties, and key aspects of gemstones. The main section of the book includes descriptions of a wide range of gems, each profiled with a color photograph showing its raw crystal, common cuts, and polished state for use in jewelry. At-a-glance charts identify refractive index, crystal group, luster, hardness and cleavage for each gem.

The book also features illustrations of priceless jewelry, plus practical information on:

• Fashioning and cutting
• Collecting, handling and storing
• Weighing and measuring gemstones
• Lapidary and jewelry-making
• Choosing a gemstone, including buying abroad
• Caring for and cleaning gemstones and jewelry
• Spotting a fake
• Retail outlets and museums around the world.

With its detailed descriptions, abundant illustrations and commentary on current developments, Gems of the World is an ideal reference for collectors, rock hounds and investors.

Cally Oldershaw is a mineralogist and liaison officer for the Geological Society of London and an examiner for the Gemmological Association of Great Britain.