Chrysoberyl Gemstones - A Collection of Historical Articles on the Origins, Structure and Properties of Chrysoberyl

Chrysoberyl Gemstones - A Collection of Historical Articles on the Origins, Structure and Properties of Chrysoberyl

Author: Various

Publisher: Read Books Ltd

Published: 2015-05-06

Total Pages: 55

ISBN-13: 1473394546

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This book contains classic material dating back to the 1900s and before. The content has been carefully selected for its interest and relevance to a modern audience. Carefully selecting the best articles from our collection we have compiled a series of historical and informative publications on the subjects of gemology and crystallography. The titles in this range include "Gemstone Manufacturing" "The Optical Properties of Gemstones and Crystals" "The Thirty-Two Classes of Crystal Symmetry" and many more. Each publication has been professionally curated and includes all details on the original source material. This particular instalment, "Chrysoberyl Gemstones" contains information on their properties, origins, structure and much more. Intended to illustrate the main features of chrysoberyl it is a comprehensive guide for anyone wishing to obtain a general knowledge of the subject and to understand the field in its historical context. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.


Topaz Gemstones - A Collection of Historical Articles on the Origins, Structure and Properties of Topaz

Topaz Gemstones - A Collection of Historical Articles on the Origins, Structure and Properties of Topaz

Author: Various

Publisher: Read Books Ltd

Published: 2015-05-06

Total Pages: 51

ISBN-13: 1473394813

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This book contains classic material dating back to the 1900s and before. The content has been carefully selected for its interest and relevance to a modern audience. Carefully selecting the best articles from our collection we have compiled a series of historical and informative publications on the subjects of gemology and crystallography. The titles in this range include "Gemstone Manufacturing" "The Optical Properties of Gemstones and Crystals" "The Thirty-Two Classes of Crystal Symmetry" and many more. Each publication has been professionally curated and includes all details on the original source material. This particular instalment, "Topaz Gemstones" contains information on their properties, origins, structure and much more. Intended to illustrate the main features of the topaz it is a comprehensive guide for anyone wishing to obtain a general knowledge of the subject and to understand the field in its historical context. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.


Russian Alexandrites

Russian Alexandrites

Author: Karl Schmetzer

Publisher:

Published: 2010

Total Pages: 141

ISBN-13: 9783510652624

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Alexandrite, a variety of chrysoberyl, and one of the finest colour-change natural gemstones, may almost be called "the national gemstone of Russia". This great prestige is based on two facts: its noble name in honour of the Tsarevich Alexander Nikolaevich (the future Tsar Alexander II) and its dazzling colours, green in daylight and red in incandescent light, the military colours of Imperial Russia. Although quantities of facetable quality alexandrite are considerably less than those of emerald, alexandrite is counted among and compared to the "big four" of the gem business: diamond - ruby - sapphire - emerald. In this book the authors present an historical overview of emerald mining in the Urals, the discovery of Russian alexandrites in the Uralian emerald mines, the naming and historical use of alexandrites and their appearance and display in mineralogical museums and the gem trade. Morphology and twinning of rough alexandrite is described for single crystals, single contact twins and cyclic twins (trillings). Mineralogical and gemmological properties are thoroughly explained and numerous photo-micrographs of inclusions and growth patterns in faceted samples are presented. Chatoyancy and asterism of alexandrite and chrysoberyl from Russia and Sri Lanka are also described. A further chapter deals with characteristic growth patterns of Russian, other natural and synthetic alexandrites. Colorimetric data of Russian alexandrites and green chrysoberyls are explained using the CIELAB colour space, and the distinction between these varieties is explained. A chapter on trace element chemistry and locality determination rounds off the book. An extensive appendix containing lists of historical names, a time table and numerous references provides valuable information on Russian alexandrites for all researchers in the mineralogical and gemmological fields as well as for gemmological laboratories, jewellers and gem dealers. Consequently, this book, illustrated with more than 200 colour figures and photographs, addresses mineralogists, gemmologists, historians, mineral and gem collectors as well as all members of the gem trade.


Zircon Gemstones - A Collection of Historical Articles on the Origins, Structure and Properties of Zircon

Zircon Gemstones - A Collection of Historical Articles on the Origins, Structure and Properties of Zircon

Author: Various

Publisher: Read Books Ltd

Published: 2015-05-06

Total Pages: 57

ISBN-13: 1473394821

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This book contains classic material dating back to the 1900s and before. The content has been carefully selected for its interest and relevance to a modern audience. Carefully selecting the best articles from our collection we have compiled a series of historical and informative publications on the subjects of gemology and crystallography. The titles in this range include "Gemstone Manufacturing" "The Optical Properties of Gemstones and Crystals" "The Thirty-Two Classes of Crystal Symmetry" and many more. Each publication has been professionally curated and includes all details on the original source material. This particular instalment, "Zircon Gemstones" contains information on their properties, origins, structure and much more. Intended to illustrate the main features of zircon it is a comprehensive guide for anyone wishing to obtain a general knowledge of the subject and to understand the field in its historical context. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.


Rocks and Minerals

Rocks and Minerals

Author: Charles A. Sorrell

Publisher: Macmillan

Published: 1973

Total Pages: 283

ISBN-13: 1582381240

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Identifies common and uncommon minerals and rocks from around the world.


Simon & Schuster's Guide to Gems and Precious Stones

Simon & Schuster's Guide to Gems and Precious Stones

Author: Kennie Lyman

Publisher: Touchstone

Published: 1986-03-13

Total Pages: 388

ISBN-13: 9780671604301

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Simon & Schuster's Guide to Gems and Precious Stones provides both the connoisseur and the casual collector with a compact, easy-to-use volume describing more than 100 rare varieties of minerals whose beauty and mystery have possessed our imaginations from time immemorial. More than 450 brilliant photographs accompany profiles of each gem, covering such aspects as appearance, physical properties -- density, hardness, refraction -- occurrence, and how to judge quality and value. Additional sections describe the process of cutting gemstones and the techniques professional gemologists use to evaluate a stone's weight and optical properties. Detailed and comprehensive, this book is essential for anyone interested in the study of gems and precious stones.