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Serenity Coated Colored Diamonds: Detection and Durability - A new multi-layer coating technique produces a variety of evenly distributed, natural-appearing colors on diamonds, but with limited durability
Gems and gemology , 2007
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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FEATURE ARTICLE - Classifying Emerald Clarity Enhancement at the GIA Gem Trade Laboratory
Gems and gemology , 1999
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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NOTES AND NEW TECHNIQUES - New Filling Material for Diamonds from Oved Diamond Company: A Preliminary Study - A first look at the properties and durability characteristics of diamonds filled with the new XL-21 glass formulation
Gems and gemology , 2000
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Chart of Commercially Available Gem Treatments - Provides a comprehensive, easy-to-use reference to the most common gem enhancements on the market today and their detectability
Gems and gemology , 2002
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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SPECIAL SESSION - Observations on GE-Processed Diamonds: A Photographic Record
Gems and gemology , 1999
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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NOTES AND NEW TECHNIQUES - A New Lasering Technique for Diamond - Because it usually lacks a surface-reaching drill hole, this new lasering procedure can be difficult to detect
Gems and gemology , 2000
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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NOTES AND NEW TECHNIQUES - A New Method for Imitating Asterism - A new polishing process is being used to create the appearance of asterism in gems that have seldom if ever shown this phenomenon previously
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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Pezzattaite from Ambatovita, Madagascar: A Now Gem Mineral - A look at the history, geology, composition, and properties of this new cesium-rich member of the beryl group
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 - Identification Challenges of the New Millennium
Gems and gemology , 1999
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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FEATURE ARTICLES - Identification of HPHT-Treated Yellow to Green Diamonds - The saturated "neon" green color is not the only unusual characteristic shown by these HPHT-treated diamonds
Gems and gemology , 2000
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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An Update on Imperial Topaz from the Capao Mine, Minas Gerais, Brazil
Gems and gemology , 1996
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Gemological Properties of Near-Colorless Synthetic Diamonds
Gems and gemology , 1997
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Some Gemological Challenges in Identifying Black Opaque Gem Materials
Gems and gemology , 1996
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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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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Identification and Durability of Lead Glass-Filled Rubies - Reports on the identifying features of rubies filled with a high-lead-content glass to make them appear more transparent
Gems and gemology , 2006
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Pink-to-Red Coral: A Guide to Determining Origin of Color - This research report explores the identifying characteristics of natural vs. dyed pink-to-red coral
Gems and gemology , 2007
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft