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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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FEATURE ARTICLES - GE POL Diamonds: Before and After - The first study of GE POL diamonds before and after HPHT processing reveals important clues to their identification
Gems and gemology , 2000
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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NOTES AND NEW TECHNIQUES - Clues to the Process Used by General Electric to Enhance the GE POL Diamonds
Gems and gemology , 1999
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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NOTES AND NEW TECHNIQUES - New Chromium- and Vanadium-Bearing Garnets from Tranoroa, Madagascar - A study of pyrope-spessartine garnets with unusual color behavior from Tranoroa, southern Madagascar
Gems and gemology , 2002
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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FEATURE ARTICLES - Sapphires from Antsiranana Province, Northern Madagascar - Learn the distinctive features of blue-green-yellow sapphires from the important basaltic deposits near Ambondromifehy
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 - Purple to Purplish Red Chromium-Bearing Taaffeites
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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NOTES AND NEW TECHNIQUES - Garnets from Madagascar with a Color Change of Blue-Green to Purple
Gems and gemology , 1999
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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NOTES AND NEW TECHNIQUES - Serendibite from Sri Lanka - A characterization of this rare gem material from Sri Lanka
Gems and gemology , 2002
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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ABSTRACTS OF FEATURE PRESENTATIONS - BY SESSION - GEM IDENTIFICATION - Distinguishing Natural from Synthetic Emeralds
Gems and gemology , 1999
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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NOTES AND NEW TECHNIQUES - The First Transparent Faceted Grandidierite, from Sri Lanka - Presents the gemological, chemical, and spectroscopic properties of the first known transparent faceted grandidierite
Gems and gemology , 2003
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