Gemstones Of The World

Author: Walter Schumann
Editor: Sterling Publishing Company, Inc.
ISBN: 9781402768293
Size: 13,18 MB
Format: PDF, ePub, Mobi
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Provides detailed information regarding the physical characteristics and unique traits of more than 1,800 precious and semiprecious stones, as well as discussing gemstone structure, production, name origin, and symbolism.

Gemstones Of The World

Author: Walter Schumann
Editor: Sterling Publishing Company, Inc.
ISBN: 9781402740169
Size: 18,18 MB
Format: PDF
Read: 694
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More than 1,500 full-color illustrations of all types of gemstones and hundreds of semi-precious stones accompany guidelines for identification and classification and articles on mining, cutting, and the properties and characteristics of each, in this newly updated edition.

Minerals Of The World

Author: Walter Schumann
Editor: Sterling Publishing Company, Inc.
ISBN: 140275339X
Size: 13,41 MB
Format: PDF, ePub, Docs
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It’s the classic work: revised and updated! Identify over 500 of the most collectible minerals quickly and easily with this fully photographed field guide. And this new reissue makes identification easier, with new cleavability ratings for each entry alongside the handy classifications based on streak color, Mohs’ hardness, and specific gravity. A complete introductory discussion of mineral forms and properties explains the essential criteria for recognition, and each of the hundreds of minerals (from Ankerite to Zinwaldite) is accompanied by information on its fracture, luster, chemical formula, aggregates, distinguishing characteristics, and localities.

The Rock And Gem Book

Author: Dan Green
Editor: Dorling Kindersley Ltd
ISBN: 0241278902
Size: 17,27 MB
Format: PDF
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The Rock and Gem Book is packed full of photos of natural wonders, including rocks, minerals, gems, shells and fossils. This children's encyclopedia displays more than 1,200 full-colour specimens, from sapphires and rubies to silver and pearl, revealing the unique qualities of each material and how it is used in industry, architecture, art and science. Including precious metals, rare fossils, tiny gemstones and giant shells, The Rock and Gem Book gives a complete overview of the Earth's naturally occurring marvels and the beautiful objects created from them.

Gemstones And Their Origins

Author: P.C. Keller
Editor: Springer Science & Business Media
ISBN: 1468466747
Size: 13,38 MB
Format: PDF, Kindle
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Each gem deposit-whether of primary origin in the parent rocks; or secondary as alluvial placers in valley floors, river gravels, or the sand of oceanic shelves presents an eloquent chronicle of the Earth's life story. It reveals to the expert the prodigious processes which formed the present crust of our planet, of which this volume discloses a small but exciting detail. The materials of the Earth's crust are the rocks. In this book, the author expounds on how they were formed, why they altered, why they became the cradles of precious gemstones, how they are categorized, and how they are now exploited by man. What initiates the growth of gemstones? How do they crystallize? Why do gemstones of the same species, originating from different sources, vary? What causes the occurrence of varieties? Why do diamonds, unlike other precious stones, occur not near the Earth's surface in its crust, but deep down beneath it in the upper mantle? These are only a few of the entrancing subjects discussed in this enlightening volume. The reader learns that the Earth is surprisingly alive and altering constantly-sometimes through slow and equable changes and at times by violent and tremendous cataclysms, events from which gemstones issue.

Tropical Gemstones

Author: Carol Clark
Editor: Tuttle Publishing
ISBN: 1462916643
Size: 12,30 MB
Format: PDF, ePub, Docs
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Learn the essentials of Asian gemestones with this useful and portable reference book. Gemstones, both mythical and real, are deeply embedded in the arts, religions and cultures of Asia. This handy pocket guide provides an excellent introduction to the full range of superb gemstones mined and processed in the region, their physical characteristics, historical importance and countries of origin. Stunning color photographs and informative text by noted writer on gemstones Carol Clark, will delight both gem collectors and lovers of fine jewelry alike. Tropical Gemstones are practical field guides, useful for identifying various natural objects ranging from plants and animals to gemstones and seashells. Each page of each title throughout the series is filled with clear, precise photographs and informative text. Scientific and local language names are given.

Gemstones

Author:
Editor: Bluetoffee
ISBN: 9810559380
Size: 19,59 MB
Format: PDF
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Gemstones: A Thai Love Story presents an essential reference guide to the world of Thai gems, for every level of interest. In four beautifully illustrated sections, the book furnishes buyers with all they need to know about buying gems in Thailand, in an easy-to-read format, set in a context of Thai history and culture. The buyer's guide is designed to cut through the complex process of gem identification and authentication. Each gem is described precisely, highlighting its distinguishing characteristics and variations, as well as its man-made imitators. The guide also acquaints readers with the history and origin of each gem and provides useful tips on how to make a good purchase, and look after the gem subsequent to purchase. An introduction to the Thai gem manufacturing process and key markets gives the layman some insight into the gem industry in Thailand, and the intricacies of gem trading, equipping the reader with the knowledge he requires when he visits one of the most exciting gem markets of the world. Finally, a concise glossary gives understanding of the technical terms used within the book.

The World Of Opals

Author: Allan W. Eckert
Editor: John Wiley & Sons
ISBN: 9780471133971
Size: 20,83 MB
Format: PDF
Read: 339
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Centuries after it was first discovered, the opal remains the undisputed Queen of Gems. A stone of incredible beauty and variety, with a background rich in myth, adventure, and intrigue, it is considered by many to be the most desirable, the most handsome, and the most precious of all gemstones. The first comprehensive book on the subject in over thirty years, The World of Opals is a complete guide to the science and history of these remarkable gems. It begins with a thorough examination of the physical properties and attributes of common and precious opals, with up-to-date information on opal formation, extraction, storage, and cutting. Next, it chronicles man’s involvement with the stone from 4000 B.C. to the present, following the opal through countless reversals of fortune and mythology as talisman, prognostic aid, patron stone of thieves, and bearer of bad luck. Readers will find fascinating details about the discovery, where-abouts, and value of famous opals, from such classic specimens as the Burning of Troy Opal to the Bonanza Opal and other more recent discoveries. Finally, the book surveys today’s major opal-producing areas and provides current information on opal occurrence worldwide. Punctuating the text are useful tables, extensive glossaries of opal types and opal-related terms, and beautiful photographs that capture the essence and mystery of this most exquisite stone. Accessible and authoritative, The World of Opals is a first-rate reference that will be consulted by mineral and gem enthusiasts for years to come.

Gemmology

Author: Peter G. Read
Editor: Butterworth-Heinemann
ISBN: 0750664495
Size: 10,41 MB
Format: PDF, ePub, Mobi
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Since Gemmology was first published, thousands of readers have used it to gain an in-depth appreciation of the science of gemmology, its history and practice. This third edition has been completely revised to cover the latest methods of gem enhancement and identification, as well as the most up to date test instruments and laboratory techniques. It includes details of the Gemmological Associations recently introduced Foundation course, and even provides sample examination questions. * Contains essential information for the Gem-A exams * Fully updated to cover recent advances and instruments * An invaluable resource for gemmologists worldwide

Firefly Guide To Gems

Author: Cally Oldershaw
Editor: Firefly Books
ISBN: 9781552978146
Size: 11,21 MB
Format: PDF, ePub, Mobi
Read: 797
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A guide to gems and precious stones covers such topics as gem formation, structural properties, fashioning and cutting, and gem classification.