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Gemology, by Cornelius S. Hurlbut, Robert C. Kammerling
Ebook Free Gemology, by Cornelius S. Hurlbut, Robert C. Kammerling
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This edition has been revised and expanded to reflect recent and varied developments in the highly specialized field of gemology. Among these are: gemstone synthesis; imitation gems; the alteration of gems to improve, add, remove or otherwise change their color, phenomena or clarity; the importance and widespread uses of the microscope to reflect the aforementioned developments; and a number of new gem minerals or new forms of previously described minerals recently discovered or actively marketed for the first time. The chapter on Descriptive Gemology has been divided into two groups: important gemstones (those gem materials most widely used in jewelry and ornamental objects) and less important gemstones (those less commonly encountered).
- Sales Rank: #1536291 in Books
- Published on: 1991-01
- Ingredients: Example Ingredients
- Original language: English
- Number of items: 1
- Dimensions: 9.43" h x .91" w x 7.78" l, .0 pounds
- Binding: Hardcover
- 352 pages
From the Publisher
This edition has been revised and expanded to reflect recent and varied developments in the highly specialized field of gemology. Among these are: gemstone synthesis; imitation gems; the alteration of gems to improve, add, remove or otherwise change their color, phenomena or clarity; the importance and widespread uses of the microscope to reflect the aforementioned developments; and a number of new gem minerals or new forms of previously described minerals recently discovered or actively marketed for the first time. The chapter on Descriptive Gemology has been divided into two groups: important gemstones (those gem materials most widely used in jewelry and ornamental objects) and less important gemstones (those less commonly encountered).
Most helpful customer reviews
19 of 20 people found the following review helpful.
Classic Text which is the basis of GIA classification
By Thomas Kabele
Cornelius Hurlbut (1906 ,2005) a Harvard University Geologist and Robert Kammerling (c1947, 1996) of the Gemological Institute of America wrote an excellent text on Gem Identification. The book became the basis of the GIA course of colored stones and colored stones identification which are required for the GIA Graduate Gemologist designation. Chapters 1-7 give basic facts on origin of gems, crystallography, chemical formulas, physical properties (hardness, specific gravity, heat conductivity), colors and optical properties. Chapters 6-7 also discuss equipment used in gem identification (specific gravity scales, heat testers, refractometer, reflectivity meters, polariscope, condensing sphere). The most important gem identification instrument is the refractometer and the authors give a detailed discussion of its uses which nicely supplements the GIA `lab manual'. Chapter 8 and 9 discuss the microscope and loupe and the spectrophotometer. Chapter 11 discusses synthetic stones (which have the same chemical, optical, and physical properties of the natural stones) and imitation stones (which merely resemble the natural stones.) The other chapters discuss enhancement, fashioning and the properties of stones on the GIA gem identification "a" and "b" lists.
Ph.D. GG (GIA)
17 of 18 people found the following review helpful.
An excellent reference source
By A Customer
This book is an excellent source of information for people interested in the field of gemmology. I have found that the contents covers a wide range of topics and presented in an easily understood format. It is a concise and well-illustrated book which makes it ideal as a reference book
1 of 1 people found the following review helpful.
A bit dated, but a good introduction
By rs11gps
A bit dated, but a good introduction to the different aspects of gemology. From the stones themselves to methods for analyzing them, the book provides a good introduction.
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