Identification Of Corundum

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Identification Of Corundum

Author : Trudy Toohill
ISBN : 1543005179
Genre :
File Size : 43.9 MB
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This book takes a look at the mineral corundum which includes the blue corundum variety, sapphire, and the red corundum variety, known as ruby. It covers the following Two Commercial Methods of Ruby Synthesis Verneuil Flame Fusion Growth Czochralski Crystal Pulling method How to Distinguish Between a Synthetic and Natural Ruby What Are Two Typical Inclusions Found in Natural Burma Rubies Why Does a Natural Blue Sapphire Show Interference Colours When Viewed Through the Table on a Polariscope and What Information About the Stone Can be Obtained Through the Colour Pattern That is Seen? Readings for a natural Sapphire on a Refractometer How to Determine Between a Natural Dark Blue Australian Sapphire and a Natural Dark Blue Spinel and a Dark Blue Paste stone Identification of Corundum is the fifteenth volume of the Australian Gemstones Series.

Gem Identification Made Easy

Author : Antoinette Leonard Matlins
ISBN : 9780943763590
Genre : Antiques & Collectibles
File Size : 68.17 MB
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This revised edition covers the latest gems, synthetics, treatments and instruments. It is easy to use, practical and non-technical indicating how to identify diamonds, coloured gemstones and pearls, as well as separating them from fakes and look-alikes. The book explains what instruments are needed and how to use them, where to obtain such instruments and what should be seen for each gemstone. Anyone can learn to identify most of the gems and imitations found in the market place. This volume is the key to avoiding costly mistakes and recognising profitable opportunities.
Category: Antiques & Collectibles

Practical Gemmology A Study Of The Identification Of Gem Stones Pearls And Ornamental Minerals

Author : Robert Webster
ISBN : 9781447498841
Genre : History
File Size : 58.20 MB
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Here will be found a shortened but complete course in gemmology, following the traditional lines adopted in teaching students at Chelsea Polytechnic in preparation for the Gemmological Association Examinations. 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.
Category: History

Handbook Of Gem Identification

Author : Richard Thomas Liddicoat
ISBN : UCAL:B4151599
Genre : Mineralogy, Determinative
File Size : 66.23 MB
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Category: Mineralogy, Determinative


Author : Hans-Rudolf Wenk
ISBN : 9781107106260
Genre : Science
File Size : 51.60 MB
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Designed for use on one- or two-semester courses, this is a comprehensive study of modern mineralogy, for undergraduate and graduate students in the fields of geology, materials science and environmental science. New online resources include laboratory exercises and PowerPoint slides, making this a sound investment for the next generation of mineralogists.
Category: Science


Author : Richard W. Hughes
ISBN : UCSC:32106009609162
Genre : Corundum
File Size : 80.17 MB
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Hughes, of the Asian Institute of Gemological Sciences, Bangkok, looks in detail at all aspects of rubies and sapphires, which, among the most sought after and precious of gems, account for over half of the world trade in colored gemstones. Includes 24 color plates and many bandw figures. Annotation copyrighted by Book News, Inc., Portland, OR
Category: Corundum


Author : George Rapp
ISBN : 9783540785941
Genre : Science
File Size : 66.55 MB
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“Archaeomineralogy” provides a wealth of information for mineralogists, geologists and archaeologists involved in archaeometric studies. The first edition was very well-received and praised for its systematic description of the rocks and minerals used throughout the world by our ancestors and for its excellent list of over 900 references, providing easy access to the fields of archaeomineralogy and geoarchaeology. This second edition of “Archaeomineralogy” takes an updated and expanded look at the human use of rocks and minerals from the Paleolithic through to the 18th century CE. It retains the structure and main themes of the original but has been revised and expanded with more than 200 new references within the text, a bibliography of additional references not included in the text, a dozen new figures (drawings and photos), coverage of many additional important mineral, rock, and gem materials, a broader geographic scope, particularly but not limited to Eastern Europe, and a more thorough review of early contributions to archaeomineralogy, especially those of Agricola. From reviews of the first edition: "... crammed full of useful information, is well-balanced using both new and Old World examples of the archaeomaterials described. It also provides a broad, but of necessity, all too brief overview of the geological raw materials used in antiquity." -- Geoscientist "...provides much interesting discussion of how particular names came to be employed by archaeologists working in different regions of the world.... much to offer for any geologist or archaeologist interested in minerals and rocks and how they have been used in the past." -- Mineralium Deposita "... a gem of a book, it's strength is that it is encyclopedic in content, if not in layout, draws on a wealth of field experience and almost every sentence contains a nugget of information" -- The Holocene
Category: Science

Journal Of The Franklin Institute

Author :
ISBN : UVA:X002092245
Genre : Electronic journals
File Size : 52.13 MB
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Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415]
Category: Electronic journals

Ruby And Sapphire

Author : Richard W. Hughes
ISBN : 0964509717
Genre :
File Size : 90.23 MB
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From the dawn of time, ruby and sapphire have both attracted and fascinated humans in ways that few other items could.While objects of desire are found throughout the natural world, physical beauty is too often ephemeral. From the allure of a man, woman, flower or butterfly, through the fleeting moments of a sunset, there is little that lasts and practically nothing that can be passed down to our descendants. The exception is precious stones. Not only are they the most durable creations of mother nature, but their visual splendor is truly eternal.In this companion to his 2013 book, Ruby & Sapphire--A Collector's Guide, Richard Hughes examines these gems from the gemological standpoint, delving into these gems not just from the aesthetic, but also from the scientific point of view.The product of nearly 40 years of firsthand experience, it covers every aspect of the subject from A-Z. History, sources, prices, quality analysis, synthetics and treatments, everything is here. Ruby & Sapphire--A Gemologist's Guide represents the most comprehensive book ever written on a single precious stone. With over 1000 photos, maps and illustrations and 3500 references, it is nothing less than a tour-de-force of gemological scholarship.

The Complete Australian Gemstones Series

Author : Trudy Toohill
ISBN : 1543007201
Genre :
File Size : 77.63 MB
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This publication contains all fifteen volumes of the complete Australian Gemstones series. These books are specifically designed for the beginner wanting to learn more about gemstones or gem fossicking, they also make a wonderful refresher course for the more experienced. Books in this series include Early Australian Gemstone Discoveries, Early Australian Diamond Discoveries, The Physical and Optical Properties of Gemstones, Identification of Quartz and Its Varieties, Identification of Feldspar and Its Varieties, Identification of Amber, Identification of Coral, Identification of Pearls, Identification of Opals, Identification of Ornamental Gem Materials, Identification of Emeralds. Identification of Garnets, Identification of Synthetic Gemstones, Identification of Diamonds and Identification of Corundum. All of these books are available for purchase through


Author : Michael O'Donoghue
ISBN : 9789400911918
Genre : Juvenile Nonfiction
File Size : 59.61 MB
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Gemstones is the first attempt in English to bring together the geological, mineralogical and gemmological developments that have taken place during the last thirty years. Though there have been many gemstone books published in that time, most have been concerned, understandably and rightly, with the science of gem testing and have covered that area very well. Details of the geological occurrence of many of the classic gemstones, and of nearly all those which have only recently been discovered, have been less adequately dealt with. Coverage has been restricted to a number of papers in a wide variety of geological and mineralogical journals. Gemstones hopes to get the balance right. In the preparation of the book all the journals and monographs in the field have been consulted so that the book should stand for some years as the authority to which gemmologists and others turn in the first instance. Ease of reference and depth of coverage make Gemstones both a reference book and a bench book. Acknow ledgements I am grateful to Brian Jackson of the Department of Geology, Royal Museums of Scotland who read the manuscript and painstakingly indicated places where amendment or alteration was needed. I am also grateful to the publishers of the books on which the line illustrations are based. The colour plates present in the book derive from a number of sources, which I would like to acknowledge as follows. Plates 1, 4-15 and 17 Crown copyright reserved.
Category: Juvenile Nonfiction

Horological Journal

Author :
ISBN : UOM:39015070530210
Genre : Clocks and watches
File Size : 29.51 MB
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Category: Clocks and watches


Author : P. G. Read
ISBN : 9781483144672
Genre : Nature
File Size : 64.79 MB
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Gemmology is a text for students preparing for the Gemmological Association's Preliminary and Diploma examinations. The book is more expansive and up-to-date than the author's earlier book, Beginner's Guide to Gemmology. The book deals with the practical and theoretical sides of gemmology. Tracing the background and science of gemmology, the book covers the gem material, geological formation, and occurrence of gemstones on the earth. The composition of gemstones from the atoms, elements, molecules, and compounds comprising them is analyzed, and the relationship between chemical composition and durability of the stone is explained. The basics of crystallography is mentioned as a tool toward understanding gemmology after which cleavage, parting, and fracture are done. A gemstone's durability and hardness and how the latter influences engineering tests and the mining techniques are compared. An important test technique to identify unmounted stones is the measure of specific gravity using displacement measurement methods and hydrostatic methods. After more descriptive details are given in identification of gemstones, whether these are synthetic or simulants, through a comprehensive explanation of the materials found in these other gemstones, the fashioning, through shaping or polishing, of gemstones is explained. Emphasis is given on the critical angle in which light rays pass in different rock densities, and then the cutting styles, gemstone polishing, and grading are discussed. Students studying for the Gemmological Association's Preliminary and Diploma examinations, jewelers, lapidarists, and diamond cutters, as well as those engaged in the hobby of gemmology, will find this book helpful and full of information toward their endeavors and hobbies.
Category: Nature