Author: Peter G Read Publisher: Elsevier ISBN: 1483192261 Category : Science Languages : en Pages : 341
Book Description
Gemmological Instruments deals with the developments in diamond grading equipment and gem testing instruments since the publication of the first edition in 1978. These developments include improvements in the versatility and styling of existing instruments such as the reflectivity meter, the composite spectroscope, and the refractometer. It also addresses the criticisms in the first edition and provides a discussion of the advantages and disadvantages of different gem testing equipment. This book is organized into 16 chapters that describe groundbreaking instruments like the thermal conductivity diamond testers and home-constructed items that while innovative have not yet been commercialized. There are also chapters dealing with microphotography and identification of synthetics and stimulants. This book also provides a listing of gemstone constants and characteristic inclusions in natural and synthetic gemstones. This book will be of interest to people interested in equipment for gem testing and diamond grading.
Author: P. G. Read Publisher: Elsevier ISBN: 1483144674 Category : Nature Languages : en Pages : 375
Book Description
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.
Author: Amanda S. Barnard Publisher: Butterworth-Heinemann ISBN: 9780750642446 Category : Science Languages : en Pages : 182
Book Description
Provides a gemmologist, gemmological (or mineralogical) student, or interested party with an overview of the synthesis of diamonds. This book begins with the history of diamond synthesis, and the theories on which much of the early work was based, before discussing the principles on which the modern processes rely.
Author: Ram Babu Sao Publisher: Ram Babu Sao ISBN: Category : Body, Mind & Spirit Languages : en Pages : 486
Book Description
Gemology is the science dealing with natural and artificial gemstone materials. It is considered a geosciences and a branch of mineralogy. This book, ‘Introduction to Gemstone Astrology’ is a unique book, which is very informative and also easy to understand. One book is truly the equivalent of several books on Gemstones Astrology. You can make predictions of suitable gemstones as per the horoscope of individual or your family member with the help of this single book. This provides some of the elementary and in depth essential elements on complete gemstone predictions. Many of the basics on gemstone astrology are explained in detail. “Money is Prosperity”. Astrology is not knowing your future, but planning your future by averting the misshapenness by action in the right time by wearing Gems, wearing Yantras, chanting Mantras and Prayers. It is important to realize that success comes only with the right actions at the right time. The whole secret of Astrology is “Right Timing”. This Book provides the best gemstone for successful ventures such as starting a business, buying a home, or investing in the Stock Market. JP Morgan made a fortune using a suitable gemstone. This knowledge is made available to you though this book. By using the book, your life will be more prosperous than ever before. It is important to work “Smartly” but not hard. Many people need to know about their financial status. Money controls the way we live our lives, and this amazing readings will give you the insight, you need to take control of your financial future. It could be one of the most important gemstones reading that you will get through this book that can truly change your life. This book will isolate time to capture the situation and reveal its significance. At last, you have discovered a direct channel that will allow you an insight into your own destiny by wearing a suitable and correct gemstone. Many “psychic services” charge you as much as $50, $75, or even $100 for a single reading of gemstone selection, but, this book offers
Author: Peter G. Read Publisher: Butterworth-Heinemann ISBN: 0750664495 Category : Design Languages : en Pages : 341
Book Description
This 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.
Author: Michael O'Donoghue Publisher: Springer Science & Business Media ISBN: 9400911912 Category : Science Languages : en Pages : 395
Book Description
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.
Author: Peter G Read
Author: Trevor Linton
Author: P. G. Read
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Author: Rubin & Son
Author: Amanda S. Barnard
Author: Ram Babu Sao
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Author: Peter G. Read
Author: Michael O'Donoghue