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Author: Basil William Anderson Publisher: Gemstone Press ISBN: Category : Antiques & Collectibles Languages : en Pages : 280
Book Description
Contents include the history and development of spectroscopy; a discussion of the nature of absorption spectra and the absorption spectra of solids and gem minerals; the many uses of the spectroscope and the spectrophotometer; light sources and the causes of color; absorption in synthetic gemstones; and more. Written for gemologists everywhere and incorporating the latest developments, The Spectroscope and Gemmology is an indispensable textbook for professional and amateur gemologists and students of gemology.
Author: Basil William Anderson Publisher: Gemstone Press ISBN: Category : Antiques & Collectibles Languages : en Pages : 280
Book Description
Contents include the history and development of spectroscopy; a discussion of the nature of absorption spectra and the absorption spectra of solids and gem minerals; the many uses of the spectroscope and the spectrophotometer; light sources and the causes of color; absorption in synthetic gemstones; and more. Written for gemologists everywhere and incorporating the latest developments, The Spectroscope and Gemmology is an indispensable textbook for professional and amateur gemologists and students of gemology.
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: Richard W. Hughes Publisher: ISBN: 9780964509719 Category : Languages : en Pages : 816
Book Description
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.
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: Mohsen Manutchehr-Danai Publisher: Springer Science & Business Media ISBN: 3662042886 Category : Science Languages : en Pages : 575
Book Description
The rapid growth of gemological sciences and mineralogy demands a dictionary such as this for gemologists, mineralogists, geologists, jewel dealers, industry and hobbyists. With some 16,000 comprehensive definitions, supplemented by more than 250 diagrams and figures, this is a one-stop reference to any matter dealing with gems and gemology.
Author: Peter G Read Publisher: Elsevier ISBN: 1483183122 Category : Nature Languages : en Pages : 241
Book Description
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.
Author: Antoinette Matlins Publisher: Turner Publishing Company ISBN: 0943763932 Category : Antiques & Collectibles Languages : en Pages : 467
Book Description
This colorful book offers you a window into the world of Mahatma Gandhi, one of the most amazing people of the twentieth century. You will learn about Gandhi’s life—from his time as a student in London to his work for equality in South Africa and India—and his methods of peaceful, but not passive, resistance to injustice.
Author: Basil William Anderson
Author: Basil William Anderson
Author: P. G. Read
Author: Richard W. Hughes
Author: Peter G. Read
Author: Colin H. Winter
Author: Basil William Anderson
Author: Antoinette Matlins
Author: Mohsen Manutchehr-Danai
Author: Peter G Read
Author: Antoinette Matlins