Author: Michael O'Donoghue
Publisher: Robert Hale
ISBN: 9780719803314
Category : Crafts & Hobbies
Languages : en
Pages : 294
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Book Description
This title is now in paperback for the first time.Artificial gemstones have been well established in the trade for some time, but now, following further refinements in their manufacture, gemmologists worldwide are facing increasing problems with identification.Today, gem-quality synthetic diamonds, once deemed impossible to produce, are becoming widely available, and, moreover, it is possible to create almost any major gemstone in whatever colour is desired. Then, too, the growth of diamonds by chemical vapour deposition is destined to present further problems. The synthetic products of the past, particularly of the 1960s, are still available, and are puzzling the newer generations of gemmologists who have not encountered them previously.In "Artificial Gemstones", Michael O'Donoghue provides the definitive guide to the various manmade substitutes thus enabling anyone handling gems to identify them accurately. Starting with the theory of synthetic gem manufacture and an explanation of the production methods used for growing and/or improving crystals - with their ornamental application - the book moves on to list and identify the materials themselves. Some of these have natural counterparts; others are new minerals and do not occur in nature. The author lists the identifying internal and external features and tests, and the book contains colour illustrations to display the inclusions found in transparent materials. The book is completed by an extensive bibliography and a useful appendix of trade names.Gemmologists, gem dealers, lapidaries, curators, amateurs and students of gemmology and mineralogy will all find this an indispensable addition to their bookshelves.
Author: Cally Oldershaw
Publisher: Firefly Books
ISBN: 9781552978146
Category : Crafts & Hobbies
Languages : en
Pages : 228
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Book Description
A guide to the identification, structure, and uses of precious and semi-precious stones, novelty stones, agates, and crystals.
Author: Michael O'Donoghue
Publisher:
ISBN:
Category : Crafts & Hobbies
Languages : en
Pages : 250
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Book Description
Author: Peter G Read
Publisher: Elsevier
ISBN: 1483183122
Category : Nature
Languages : en
Pages : 241
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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: Renee Newman
Publisher:
ISBN: 9780929975412
Category : Emeralds
Languages : en
Pages : 0
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Book Description
This guide helps buyers to evaluate these spectacular gems and it updates professionals on new treatments and sources of corundum and emerald. Using close-up photographs, the book shows how to make visual judgements about clarity. transparency, cut quality and brilliance. In addition, it helps you to understand lab reports and find appraisers and labs. You will also get tips on detecting imitations and synthetic stones. Let this guide provide the in-depth information you will need to be a smart buyer. Topics in this guide include: Quality evaluation; Gem treatments; Fakes and synthetics; Lab reports; Geographic sources; Appraisals; Gem cleaning & care; Savvy buying.
Author: Antoinette Leonard Matlins
Publisher: Gemstone Press
ISBN: 0943763452
Category : Antiques & Collectibles
Languages : en
Pages : 211
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Book Description
Purchasing coloured gemstones can be a magical experience, filled with excitement and anticipation. But lack of information, error, or misrepresentation can make buying gemstones confusing, intimidating, overwhelming, and costly. With more varieties than ever before to choose from, including altogether new gems, revolutionary new cuts, and new ways to buy gems -- such as internet auctions and TV shopping -- there has never been a more exciting time to buy or collect coloured gemstones. But there are also new high-tech treatments and sophisticated frauds to look out for. Lack of information, error, or misrepresentation can make the thrill of buying a gem or piece of jewellery confusing, intimidating, overwhelming, and costly. Buyers need a source of expert guidance. To help you avoid the pitfalls and keep the magic, Antoinette Matlins, an internationally respected expert on buying gems, puts her insider knowledge to work for you in this easy-to-read, easy-to-use guide. Practical, comprehensive, and easy to understand, the guide offers in depth all the information you need in order to know what to look for and what to look out for, including: what qualifies as a 'gemstone'?; how to evaluate colour -- and its impact on price; deciding between a natural gem and an enhanced gem; coloured gemstone synthesis and treatment; what to ask when buying the stone; what to get in writing; how to get what you want within your budget; price guides for popular gems, opals, and synthetic stones; And much, much more!
Author: Richard W. Wise
Publisher:
ISBN: 9780972822381
Category : Gems
Languages : en
Pages : 0
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Book Description
The definitive book for anyone wanting to learn how the best gemologists in the world evaluate precious gems, and what makes one stone merely a good stone versus a truly fabulous museum-quality gem. The author, Richard W. Wise, is one of the world's foremost gemologists.
Author: Cally Hall
Publisher: National Geographic Books
ISBN: 0744020557
Category : Nature
Languages : en
Pages : 0
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Book Description
Unearth a treasure trove of knowledge on over 130 gemstones from around the world. Learn how gemstones are formed and how to recognize them by their unique qualities and colors. It’s a wonderful book for beginners, students and gemstone-enthusiasts that includes the latest scientific research and specimen classification. Handbook of Gemstones is filled with all you need to know about the fascinating world of gemstones — cut and uncut stones, organic gemstones and precious metals. Inside, you’ll find: • Fast facts for quick reference, including chemical composition, hardness, gravity, luster and reflective value. • Photo close-ups of key details and highlights of distinguishing features. • Illustrations of faceting and shapes popular for each gemstone. • A detailed introduction to everything a beginner gemologist needs to know, including how gemstones form, the different properties, crystal shapes, faceting and the history of gems. Everything you ever wanted to know about gems Delve into the one-of-a-kind characteristics, colors and attributes of more than 130 gemstones with this compact visual guide. For easy classification, each stone’s entry includes annotated photographs to highlight distinguishing features and concise details about the attributes of gems. Designed for beginners and experienced collectors alike, this gemology book explores what gemstones are, how they are classified and how to identify them by their physical and optical properties. It also shows you how they were fashioned and imitated throughout history. Learn the differences between varieties of cut and uncut stones, organic gemstones and precious metals. It includes a glossary for many more technical and scientific terms, and over 800 high-quality photos of gems, making it the ideal gift for any budding gemologist! Love what you’re seeing? Check out other titles in the series! The DK Handbook series is an incredible collection of titles that fascinate curious minds. Other books include Rocks and Minerals, Dinosaurs, and Prehistoric Life, and Stars and Planets.
Author: Joel E. Arem
Publisher:
ISBN: 9780945005094
Category : Crafts & Hobbies
Languages : en
Pages : 159
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Book Description
This new edition of the classic consumer guide to precious stones and their settings is packed full of color photographs and comprehensive information about gems in a portable format. Written simply and clearly, it answers consumers' questions and informs them of what they will encounter in the marketplace. 186 illustrations.
Author: Yulia Van Doren
Publisher: Hardie Grant Publishing
ISBN: 1787131963
Category : Body, Mind & Spirit
Languages : en
Pages : 172
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Book Description
From choosing and using to programming, charging and cleansing, Crystals is a modern guide to enhancing your life with these enchanting stones. Often referred to as ‘wisdom keepers’, crystals hold millions of years of the Earth’s history within them. Through emitting steady vibrations, they will help you to become more centered and balanced, creating spaces of Zen around you and your home. Featuring 60 of the most common and interesting crystals, this is a practical guide that will teach you about each stone’s individual properties and how to harness their powers. Discover which crystals are right for you, where best to position them, the perfect pairings and learn how to look after your crystals on a daily basis to deflect any negativity in your life. Whether you use Fluorite to increase your productivity, Smoky Quartz to detoxify or Rose Quartz to create harmony in your relationships, this practical guide will equip you with all you need to harness the power of your crystals. Disconnect with the digital world and reconnect with your spiritual self as Crystals provides a fresh take on crystal healing that helps you to enhance your inner positivity.
