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FEATURE ARTICLE - Modeling the Appearance of the Round Brilliant Cut Diamond: An Analysis of Fire, and More About Brilliance GIA's latest research on diamond cut introduces a metric for fire, DCLR, and reveals that all facets of a round brilliant affect its fire and brilliance
Gems and gemology , 2001
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Characterization and Grading of Natural-Color Pink Diamonds - Based on the largest sample of pink diamonds published to date, this report looks at differences between type I and type II pink diamonds and examines the color description terminology used for pink diamonds on GIA Gem Trade Laboratory grading reports
Gems and gemology , 2002
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Gemesis Laboratory-Created Diamonds - A study of the jewelry-quality yellow synthetic diamonds being grown on a commercial scale by Gemesis Corp. of Sarasota, Florida
Gems and gemology , 2002
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Gem-Quality Synthetic Diamonds Grown by a Chemical Vapor Deposition (CVD) Method - Description and identifying characteristics of Apollo Diamond Inc.'s facetable, single-crystal type Ila CVD-grown synthetic diamonds
Gems and gemology , 2003
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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ABSTRACTS OF FEATURE PRESENTATIONS - BY SESSION - GEM IDENTIFICATION - The Ongoing Challenge of Diamond Identification
Gems and gemology , 1999
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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FEATURE ARTICLES - Discovery and Mining of the Argyle Diamond Deposit, Australia - Learn about the development of Australia's first major diamond mine, the world's largest source of diamonds by volume
Gems and gemology , 2001
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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FEATURE ARTICLES - Hydrothermal Synthetic Red Beryl from the Institute of Crystallography, Moscow - Grown to mimic the beautiful red beryl from Utah, this synthetic can be identified by its internal growth zoning, chemistry, and spectral features
Gems and gemology , 2001
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Red Beryl from Utah: A Review and Update - A report on the geology, history, and current status of the world's only known occurrence of gem-quality red beryl
Gems and gemology , 2003
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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FEATURE ARTICLES - An Update on "Paraiba" Tourmaline from Brazil - Mining activities for these vivid cuprian elbaites are expanding at the original deposit in Paraiba State, and similar tourmalines are also being mined in adjacent Rio Grande do Norte State
Gems and gemology , 2001
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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The Ultimate Gemologist: A Tribute to Richard T. Liddicoat - A look at the extraordinary career of Richard Liddicoat
Gems and gemology , 2002
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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FEATURE ARTICLES - Russian Synthetic Ametrine
Gems and gemology , 1999
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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FEATURE ARTICLES - Ruby and Sapphire from Jegdalek, Afghanistan - Explore the mining and gemology of gem corundum from this historic source
Gems and gemology , 2000
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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NOTES AND NEW TECHNIQUES - Natural-Color Purple Diamonds from Siberia - A gemological and spectroscopic investigation of rare purple diamonds from Siberia to better understand their color and its causes
Gems and gemology , 2008
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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An Updated Chart on the Characteristics of HPHT-Grown Synthetic Diamonds - Summarizes the features of synthetic diamonds currently in the gem market that are grown at high pressure and high temperature (HPHT) conditions
Gems and gemology , 2004
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Lab-Grown Colored Diamonds from Chatham Created Gems - Identifying characteristics of yellow, blue, green, and pink synthetic diamonds from a new commercial source in Asia
Gems and gemology , 2004
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Beryllium Diffusion of Ruby and Sapphire - An in-depth report on the process and characteristics of beryllium diffusion into corundum. Examination of hundreds of Be-diffused sapphires revealed that, in many instances, standard gemological tests can help identify these treated corundums
Gems and gemology , 2003
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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NOTES AND NEW TECHNIQUES - An Important Exhibition of Seven Rare Gem Diamonds - A look at the background and some gemological observations of seven important diamonds on display at the Smithsonian Institution from June to September 2003, in an exhibit titled "The Splendor of Diamonds."
Gems and gemology , 2003
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Russian Synthetic Pink Quartz
Gems and gemology , 1998
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Synthetic Moissanite: A New Diamond Substitute
Gems and gemology , 1997
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Characterization and Grading of Natural-Color Yellow Diamonds - Using a sample base of more than 24,000, this article explores the color grading of natural-color yellow diamonds at the GIA Gem Laboratory and reports on their gemological and spectroscopic properties
Gems and gemology , 2005
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft