Guide to Gems (Firefly Guides) - Oldershaw, Call

gemley valuations

A reference guide to gems, semi-precious stones and crystals. Gemstones and crystals are used for jewellery, 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, velty 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 jewellery. 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) Aluminium oxide (sapphire and ruby) Phosphate (turquoise) Silica (opal) A fascinating profile of each gem is accompanied with colour photographs of the raw crystal, common cuts, and finally polished for use in jewellery. 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.

Key Features
Author(s) Cally Oldershaw
Publisher Firefly Books Ltd
Date of Publication 18/09/2003
Language English
Format Paperback / softback
ISBN-10 1552978141
ISBN-13 9781552978146
Subject Natural History: General
Series Title Firefly Guides
Publication Data
Place of Publication Ontario
Country of Publication Canada
Imprint Firefly Books Ltd
Content Note illustrations
Weight 336 g
Width 129 mm
Height 196 mm
Spine 14 mm
Editorial Details
Format Details Trade paperback (US),Unsewn / adhesive bound
Author Biography Cally Oldershaw is a mineralogist and Liaison Officer for the Geological Society of London as well as an examiner for the Gemmological Association of Great Britain.
Copyright in bibliographic data and cover images is held by Nielsen Book Services Limited or by the publishers or by their respective licensors: all rights reserved.

Type: book

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