This webinar that took place on October 25th 2020 as part of our new series of webinars, called "Let's read & Talk about Gemology". For that second session, I invited Dr. John L. Emmett, a scientist that I truly appreciated to work with during my time at GIA as he has a very singular profile within the gemological community:
He spent most of his career as one of the World’s top laser scientists: From 1975 to 1988 he was the Associate Director of the Lawrence Livermore National Laboratory in California (see: www.llnl.gov ). There he assembled and lead the finest team of scientists and engineers to work on lasers.
After retiring he created « Crystal Chemistry » with Troy R. Douthit with objective to understand the high temperature thermochemistry of corundum, and using that understanding to optimize heat treatment of gem rubies & sapphires. He was then consultant for some major gemological laboratories such as the GIA.
With the arrival of the Beryllium treatment in the early 2002, John Emmett was the scientist who advised laboratories regarding that issue. Thanks to his input the understanding of color in corundum will really increase in the following years as LA-ICP-MS will arrive in many laboratories, spectroscopy will be taken very seriously and last but not the least for me: Field Gemology will be seen as an important tool to provide to lab trustable reference samples.
Dr. John Emmett received in 2014 the Bonnano Award for Excellence in Gemology by the AGA (accreditedgemo... )
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The main purpose of that webinar was to get from John the story behind his interest for gemology that lead him to write the article on the "Beryllium Diffusion of Ruby and Sapphire" published in "Gem & Gemology" in 2003 and few other article of great scientific and gemological interest:
- www.gia.edu/do...
- www.gia.edu/do...
- www.gia.edu/do...
- www.gia.edu/do...
Enjoy!
26 сен 2024
