Ebook288 pages6 hours
Gemmology
By P. G. Read
Rating: 4.5 out of 5 stars
4.5/5
()
About this ebook
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.
Related to Gemmology
Related ebooks
Gemmological Instruments: Their Use and Principles of Operation Rating: 5 out of 5 stars5/5Gemstone Facet Cutting - A Collection of Historical Articles on Methods and Equipment Used for Working Gems Rating: 0 out of 5 stars0 ratingsFaceted Gems - A Historical Article on the Methods and Equipment Used in Lapidary Rating: 0 out of 5 stars0 ratingsThe Cutting, Setting and Engraving of Precious Stones - A Historical Article on Working Gemstones Rating: 0 out of 5 stars0 ratingsRuby Gemstones - A Collection of Historical Articles on the Origins, Structure and Properties of the Ruby Rating: 5 out of 5 stars5/5Popular Gemology Rating: 0 out of 5 stars0 ratingsPractical Gemmology - A Study of the Identification of Gem-Stones, Pearls and Ornamental Minerals Rating: 0 out of 5 stars0 ratingsZircon Gemstones - A Collection of Historical Articles on the Origins, Structure and Properties of Zircon Rating: 0 out of 5 stars0 ratingsProspecting and Exploration of Mineral Deposits Rating: 5 out of 5 stars5/5Beginner's Guide to Gemmology Rating: 4 out of 5 stars4/5Gem Testing Rating: 4 out of 5 stars4/5Dichroscopes Made Easy: The "RIGHT-WAY" Guide to Using Gem Identification Tools Rating: 5 out of 5 stars5/5Chelsea and Synthetic Emerald Filters Made Easy: The "RIGHT-WAY" Guide to Using Gem Identification Tools Rating: 4 out of 5 stars4/5Gem Identification Made Easy (4th Edition): A Hands-On Guide to More Confident Buying & Selling Rating: 5 out of 5 stars5/5Refractometers Made Easy: The "RIGHT-WAY" Guide to Using Gem Identification Tools Rating: 4 out of 5 stars4/5Cutting and Polishing Gemstones - A Collection of Historical Articles on the Methods and Equipment Used for Working Gems Rating: 0 out of 5 stars0 ratingsUltraviolet Lamps Made Easy: The "RIGHT-WAY" Guide to Using Gem Identification Tools Rating: 0 out of 5 stars0 ratingsRare Gemstones and Unknown Precious Stones Rating: 5 out of 5 stars5/5Gemstones Rating: 4 out of 5 stars4/5The Art of Gem Cutting - Including Cabochons, Faceting, Spheres, Tumbling and Special Techniques Rating: 0 out of 5 stars0 ratingsSSEF Diamond-Type Spotter and Blue Diamond Tester Made Easy: The "RIGHT-WAY" Guide to Using Gem Identification Tools Rating: 0 out of 5 stars0 ratingsLoupes Made Easy: The "RIGHT-WAY" Guide to Using Gem Identification Tools Rating: 5 out of 5 stars5/5Gem Identification Made Easy (5th Edition): A Hands-On Guide to More Confident Buying & Selling Rating: 1 out of 5 stars1/5Gemstone Guide Book Rating: 3 out of 5 stars3/5Emerald Gemstones - A Collection of Historical Articles on the Origins, Structure, Properties and Uses of Emeralds Rating: 0 out of 5 stars0 ratingsColored Gemstones 3/E: The Antoinette Matlin's Buying Guide Rating: 4 out of 5 stars4/5A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Rating: 5 out of 5 stars5/5
Earth Sciences For You
Foraging for Survival: Edible Wild Plants of North America Rating: 0 out of 5 stars0 ratingsThe Witch's Yearbook: Spells, Stones, Tools and Rituals for a Year of Modern Magic Rating: 5 out of 5 stars5/5The Pocket Guide to Prepping Supplies: More Than 200 Items You Can?t Be Without Rating: 5 out of 5 stars5/5Five Acres and Independence Rating: 4 out of 5 stars4/5A Fire Story: A Graphic Memoir Rating: 4 out of 5 stars4/5Norwegian Wood: Chopping, Stacking, and Drying Wood the Scandinavian Way Rating: 4 out of 5 stars4/5SAS Survival Handbook, Third Edition: The Ultimate Guide to Surviving Anywhere Rating: 4 out of 5 stars4/5Devil's Gate: Brigham Young and the Great Mormon Handcart Tragedy Rating: 4 out of 5 stars4/5Geology: A Fully Illustrated, Authoritative and Easy-to-Use Guide Rating: 4 out of 5 stars4/5Rockhounding for Beginners: Your Comprehensive Guide to Finding and Collecting Precious Minerals, Gems, Geodes, & More Rating: 0 out of 5 stars0 ratingsZondervan Essential Atlas of the Bible Rating: 5 out of 5 stars5/51 Dead in Attic: After Katrina Rating: 4 out of 5 stars4/5Nuclear War Survival Skills: Lifesaving Nuclear Facts and Self-Help Instructions Rating: 4 out of 5 stars4/5The Phantom Atlas: The Greatest Myths, Lies and Blunders on Maps Rating: 4 out of 5 stars4/5Roadside Geology of Georgia Rating: 0 out of 5 stars0 ratingsAnswers to Questions You've Never Asked: Explaining the 'What If' in Science, Geography and the Absurd Rating: 3 out of 5 stars3/5We Are the Weather: Saving the Planet Begins at Breakfast Rating: 4 out of 5 stars4/5Don't Know Much About Geography: Everything You Need to Know About the World but Never Learned Rating: 0 out of 5 stars0 ratingsHerbalism and Alchemy Rating: 0 out of 5 stars0 ratingsThe Children's Blizzard Rating: 4 out of 5 stars4/5Geography For Dummies Rating: 4 out of 5 stars4/5Lake Superior Rocks & Minerals Field Guide Rating: 0 out of 5 stars0 ratingsThe Finest Hours: The True Story of the U.S. Coast Guard's Most Daring Sea Rescue Rating: 4 out of 5 stars4/5Being Human: Life Lessons from the Frontiers of Science (Transcript) Rating: 4 out of 5 stars4/5Patterns in Nature: Why the Natural World Looks the Way It Does Rating: 5 out of 5 stars5/5Rockhounding & Prospecting: Upper Midwest: How to Find Gold, Copper, Agates, Thomsonite, and Other Favorites Rating: 5 out of 5 stars5/5
Reviews for Gemmology
Rating: 4.5 out of 5 stars
4.5/5
6 ratings1 review
- Rating: 4 out of 5 stars4/5Detailed book about all facets of gems (pun intended). I learned a lot.
Book preview
Gemmology - P. G. Read
Enjoying the preview?
Page 1 of 1