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Gemmological Instruments

Author: Peter G Read
Publisher: Elsevier
ISBN: 1483192261
Size: 76.44 MB
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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: Peter Read
Publisher: Routledge
ISBN: 1136000100
Size: 27.72 MB
Format: PDF, Kindle
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This second edition 'Gemmology' has been expanded and updated throughout by the well known writer and editor of Butterworth-Heinemann's gemmology series, Peter Read. This is a much needed update of a classic text and new syllabus information and sample examination theory papers for the Gemmological Association's Preliminary and Diploma courses are included. The additions also incorporate more recent developments, such as the introduction of synthetic moissanite and the De Beer's instruments for distinguishing between natural and synthetic diamonds. 'Gemmology' still serves as a useful reference guide for gemmologists detailing the latest natural and synthetic gem materials and is an invaluable text for anyone in the gemmological profession.

Beginner S Guide To Gemmology

Author: Peter G Read
Publisher: Elsevier
ISBN: 1483183122
Size: 13.81 MB
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Beginner's Guide to Gemmology presents the profiles of the principal gem materials. This book discusses the interesting characteristics of gemstones as the growing consumer market jewelry resulted in increased sales of gem testing instruments. Organized into 12 chapters, this book begins with an overview of the development of the science of gemmology. This text then explains the fundamental qualities necessary in a gem, including color, hardness, specific gravity, crystallography, refractive index, pleochroism, critical angle, luminescence, and absorption spectra. Other chapters consider the organic gem materials, including amber, ivory, coral, tortoiseshell, jet, ebony, and pearl. This book discusses as well the various methods used in the production of man-made gemstones and the commercial use in gem testing. The final chapter deals with the composition of synthetic gemstones. This book is a valuable resource for gemmologists and jewelers. Students who intend to become a qualified gemologist will also find this book extremely useful.

Surveying Instruments And Their Operational Principles

Author: L. Fialovszky
Publisher: Elsevier
ISBN: 0444599037
Size: 32.48 MB
Format: PDF, Docs
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The book gives a detailed theoretical background of the constructional principles of instruments necessary for the most general tasks of surveying. Undergraduate and graduate students will find it very useful in surveying studies to get acquainted with the broad variety of instruments, both classical and new ones. At the same time, specialists in surveying will also find the book full of new material. The book contains about 600 pictures, including photographs and detailed descriptions of the most representative types of instrumentation. Older types of instruments already out of use, or used only occasionally, are described in broad outline, mentioning basic principles, methods of testing and possibilities for their modernization. New categories of instruments, such as gyroscopes, compensation levelling instruments, electronic theodolites, distance meters and tacheometers, are dealt with in more detail. Care has been taken to include the automation which is rapidly spreading in all fields of instrument manufacture, being necessary to reduce manual operations. The book is intended for builders, architects, technicians, teachers of surveying and professional manufacturers.

The Diamond Formula

Author: Amanda S. Barnard
Publisher: Butterworth-Heinemann
ISBN: 9780750642446
Size: 61.23 MB
Format: PDF
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'The Diamond Formula' offers the diamond industry and all interested parties a comprehensive text on synthetic diamonds, joining together the research, achievements, theories, experimental and analytical data by recognized experts in the field, while encompassing a gemmological interpretation. The book offers the average gemmologist, gemmological (or mineralogical) student, or interested party, a concise and easy to decipher overview of the synthesis of diamonds to date. Each of the elements and various topics have at some time been the subject of a lengthy and detailed text in their own right and references are used to ensure that the reader can follow up these leads. The text 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. The following chapters cover the advent of success, commercial applications, synthetic diamond products, producers, gemmological properties and identification of synthetic diamonds. The final section discusses briefly diamond synthesis by CVD and application for this technology. Comprehensive text for a wide market Easy to decipher overview of the synthesis of diamonds Detailed reference section for follow up work