Firefly Guide To Gems

A reference guide to gems, semi-precious stones and crystals.

Gemstones and crystals are used for jewelry, industry, lasers and precision technology. Firefly Guide to Gems is a practical, compact guide to the identification and use of precious and semi-precious stones, novelty stones, agates and crystals.

An introduction explains geology, chemistry and gemstone properties in clear and accessible terms. Key aspects of gemstones are explained such as crystal structures and optical and physical properties.

The first section of the book focuses on precious gems in their many forms, with illustrations of priceless jewelry. Practical information includes:

• Fashioning and cutting
• Types and shapes of cut
• Collecting
• Handling and storing gemstones
• Weighing and measuring stones

The second and main section supplies complete descriptions of a wide range of gems, organized by chemical composition, for instance:

• Carbon (diamond)
• Aluminum oxide (saphire and ruby)
• Phosphate (turquoise)
• Silica (opal)

A fascinating profile of each gem is accompanied with color photographs of the raw crystal, common cuts, and finally polished for use in jewelry. At-a-glance charts provide technical details such as refractive index, crystal group, luster, hardness and cleavage for each gem.

Easy-to-read and abundantly illustrated, Firefly Guide to Gems is ideal for collectors and rockhounds.

This illustrated guide to gemstones begins with discussion of gem formation; mining, optical, physical, and structural properties; fashioning and cutting; gem classification; and historical material. The bulk of the work consists of listings of 130 varieties of gems illustrated with photographs and illustrations of cut and uncut varieties and gems mounted in jewelry. Entries explore issues of formation, evaluation, synthesizing, and trade. Also included are maps of major gem locations around the world.
Annotation ©2004 Book News, Inc., Portland, OR (booknews.com)

A reference guide to gems, semi-precious stones and crystals.

Gemstones and crystals are used for jewelry, industry, lasers and precision technology. Firefly Guide to Gems is a practical, compact guide to the identification and use of precious and semi-precious stones, novelty stones, agates and crystals.

An introduction explains geology, chemistry and gemstone properties in clear and accessible terms. Key aspects of gemstones are explained such as crystal structures and optical and physical properties.

The first section of the book focuses on precious gems in their many forms, with illustrations of priceless jewelry. Practical information includes: Fashioning and cuttingTypes and shapes of cutCollectingHandling and storing gemstonesWeighing and measuring stones

The second and main section supplies complete descriptions of a wide range of gems, organized by chemical composition, for instance: Carbon (diamond)Aluminum oxide (saphire and ruby)Phosphate (turquoise)Silica (opal)

A fascinating profile of each gem is accompanied with color photographs of the raw crystal, common cuts, and finally polished for use in jewelry. At-a-glance charts provide technical details such as refractive index, crystal group, luster, hardness and cleavage for each gem.

Easy-to-read and abundantly illustrated, Firefly Guide to Gems is ideal for collectors and rockhounds.

A guide to the identification, structure, and uses of precious and semi-precious stones, novelty stones, agates, and crystals.