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The Impact of Internal Whitish and Reflective Graining on the Clarity Grading of D-to-Z Color Diamonds at the GIA Laboratory - A study of two important types of graining and how GIA determines their impact on a diamond's clarity grade
Gems and gemology , 2006
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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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 - Characteristics of Nuclei in Chinese Freshwater Cultured Pearls - A study of approximately 41,000 samples shows evidence of tissue nucleation only
Gems and gemology , 2000
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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FEATURE ARTICLES - The Current Status of Chinese Freshwater Cultured Pearls - Based on recent visits to the pearl farms of Hanzhou Province, the authors report on the latest techniques being used to produce Chinese freshwater cultured pearls
Gems and gemology , 2001
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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A Foundation for Grading the Overall Cut Quality of Round Brilliant Cut Diamonds In the third installment of GIA's research on diamond cut, the authors describe their use of observation testing to help determine the factors that are important in evaluating the quality of a diamond's cut. They then introduce the new GIA diamond cut grading system, which provides a single overall cut quality grade for standard round brilliants
Gems and gemology , 2004
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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A Contribution to Understanding the Effect of Blue Fluorescence on the Appearance of Diamonds
Gems and gemology , 1997
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Treated-Color Pink-to-Red Diamonds from Lucent Diamonds Inc. - A report on the gemological properties and identifying characteristics of the new treated-color natural diamonds from Lucent Diamonds
Gems and gemology , 2005
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Experimental CVD Synthetic Diamonds from LIMHP-CNRS, France - Reports on the properties and identification features of six CVD synthetic diamonds grown for experimental purposes at the LIMHP-CNRS laboratory in Paris
Gems and gemology , 2005
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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G. Robert Crowningshield: A Legendary Gemologist - A look at the extraordinary career of G. Robert Crowningshield
Gems and gemology , 2003
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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Latest-Generation CVD-Grown Synthetic Diamonds from Apollo Diamond Inc. - Presents the gemological and spectroscopic properties of Apollo's latest products, which show significant improvements in size, color, and clarity
Gems and gemology , 2007
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft
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RAPID COMMUNICATIONS - Polymer-Impregnated Turquoise
Gems and gemology , 2007
Enthalten in: Gems and gemology
OLC Kunst und Kunstwissenschaft