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Mary Johnson's study of emerald filler durability was voted G&G's Most Valuable Article of 2007. One of the test samples was this 0.74 ct emerald filled with Araldite 6010, which showed an obvious change after 30 minutes in the ultrasonic cleaner.
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Gems & Gemology is pleased to announce the winners of this year's Dr. Edward J. Gübelin Most Valuable Article Award, as voted by the journal's readers. The winners' photos and brief biographies will be featured in the upcoming Spring 2008 issue of G&G.
The first-place article was Dr. Mary Johnson's "Durability Testing of Filled Emeralds" (Summer 2007), which focused on a long-term study of the stability and durability of nine emerald-filling substances to several common conditions of wear and cleaning. Formerly manager of research and development at GIA, Johnson is the principal of Mary Johnson Consulting in San Diego, California.
Second place went to "Serenity Coated Colored Diamonds: Detection and Durability" (Spring 2007). In this article, Andy H. Shen and co-authors examined a new multilayer coating technique that produces evenly distributed, natural-looking fancy colors on diamonds. Dr. Shen is a research scientist at the GIA Laboratory in Carlsbad, California.
The third-place winner was "Latest-Generation CVD-Grown Synthetic Diamonds from Apollo Diamond Inc." (Winter 2007) by Wuyi Wang et. al. This article reported on Apollo's latest production, which showed significant improvements in size, color and clarity. Dr. Wang is manager of research projects at the GIA Laboratory in New York.
Congratulations to Dr. Edward Blomgren of Owls Head, New York, whose ballot was drawn from the many entries to win a three-year subscription to G&G and copies of two Gems & Gemology in Review volumes, Synthetic Diamonds and Colored Diamonds.
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