Search Results for "gemmology"

Gemmology

Gemmology

  • Author: Peter G. Read
  • Publisher: Butterworth-Heinemann
  • ISBN: 0750664495
  • Category: Science
  • Page: 324
  • View: 7860
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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

Gemmology

Gemmology

  • Author: P. G. Read
  • Publisher: Elsevier
  • ISBN: 1483144674
  • Category: Nature
  • Page: 370
  • View: 7406
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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.

Beginner's Guide to Gemmology

Beginner's Guide to Gemmology

  • Author: Peter G Read
  • Publisher: Elsevier
  • ISBN: 1483183122
  • Category: Nature
  • Page: 240
  • View: 1531
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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.

Gemstones of Pakistan

Gemstones of Pakistan

geology and gemmology

  • Author: Ali H. Kazmi,Michael O'Donoghue
  • Publisher: N.A
  • ISBN: N.A
  • Category: Nature
  • Page: 146
  • View: 7680
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The Journal of Gemmology

The Journal of Gemmology

  • Author: N.A
  • Publisher: N.A
  • ISBN: N.A
  • Category: Precious stones
  • Page: N.A
  • View: 8482
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Vols. for July 1964 include Proceedings of the Gemmological Association of Great Britain.

The Journal of Gemmology and Proceedings of the Gemmological Association of Great Britain

The Journal of Gemmology and Proceedings of the Gemmological Association of Great Britain

  • Author: N.A
  • Publisher: N.A
  • ISBN: N.A
  • Category: Precious stones
  • Page: N.A
  • View: 6367
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Vols. for July 1964 include Proceedings of the Gemmological Association of Great Britain.

Practical Gemmology

Practical Gemmology

A Study of the Identification of Gem-stones, Pearls, and Ornamental Minerals

  • Author: Robert Webster
  • Publisher: N.A
  • ISBN: N.A
  • Category: Gems
  • Page: 209
  • View: 3919
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Dictionary of Gemmology

Dictionary of Gemmology

  • Author: Peter G. Read
  • Publisher: Butterworth-Heinemann
  • ISBN: N.A
  • Category: Gemology
  • Page: 240
  • View: 4647
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