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» Scientific Recognition for AGS Cut Grade Technology

Scientific Recognition for AGS Cut Grade Technology

P: 11/5/2007 8:00:50 PM
JohnQuixote Ideal Rock Total Posts: 5,212 Last Post: 5/24/2008 Member Since: 9/9/2004	Congratulations to Peter Yantzer, Jose Sasian, Jason Quick, Jacob Sheffield, Jim Caudill and everyone at AGSL. Their report “Evaluation of brilliance, fire and scintillation in round brilliant gemstones” appeared in the September issue of Optical Engineering, the monthly journal of SPIE. The journal publishes peer-reviewed papers reporting on research and development in optical science and engineering and the practical applications of known optical science, engineering, and technology. Full story. For any who have not read it, the paper is a great overview of past and ongoing research into illumination effects associated with diamond beauty: http://www.agslab.com/spie/spie_lo_res.pdf "Abstract: We discuss several illumination effects in gemstones and present maps to evaluate them. The matrices and tilt views of these maps permit one to find the stones that perform best in terms of illumination properties. By using the concepts of the main cutter’s line, and the anti-cutter’s line, the problem of finding the best stones is reduced by one dimension in the cutter’s space. For the first time it is clearly shown why the Tolkowsky cut, and other cuts adjacent to it along the main cutter’s line, is one of the best round brilliant cuts. The maps we introduce are a valuable educational tool, provide a basis for gemstone grading, and are useful in the jewelry industry to assess gemstone performance." If things like 40 blue, fire maps and "on the ledge" turn your mental crank it's a page turner. ...In all sincerity we are humbled by the efforts of the dedicated researchers out there. Thank you AGSL, and congratulations on the recognition. John __________________________ John Pollard Whiteflash Director of Education 2004-2007
Posted: 11/5/2007 8:00:50 PM

There are 7 replies to this message. There are 7 replies on this page.

P: 11/5/2007 11:52:15 PM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	congrates to the folks at AGS!!! ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 11/5/2007 11:52:15 PM

P: 11/6/2007 12:02:57 AM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	hmmmm interesting combo but totaly out of touch with todays reality of asscher cuts. Table 2 Square emerald see Fig. 62. Table % Corner Ratio Crown 1 Crown 2 Crown 3 Pavilion 1 Pavilion 2 Pavilion 3 47.6% 22.9% 46.9 deg 40.0 deg 34.0 deg 47.6 deg 39.2 deg 31.2 deg ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 11/6/2007 12:02:57 AM

P: 12/4/2007 8:00:36 PM
JohnQuixote Ideal Rock Total Posts: 5,212 Last Post: 5/24/2008 Member Since: 9/9/2004	Bump. AGS made the cover. (cue applause) John __________________________ John Pollard Whiteflash Director of Education 2004-2007
Posted: 12/4/2007 8:00:36 PM

P: 12/4/2007 8:40:06 PM
stebbo Cut Rock Total Posts: 466 Last Post: 1/27/2008 Member Since: 6/8/2006	Well it was co-authored by an optical sciences professor who is a member of the optical society publishing the journal.
Posted: 12/4/2007 8:40:06 PM

P: 12/5/2007 12:09:40 AM
DiamondExpert Ideal Rock Total Posts: 1,243 Last Post: 6/20/2009 Member Since: 1/16/2003	This is common in academia - where profs belong to scientific organizations which operate journals - not a conflict of interest because there may be 20,000 members and the manuscripts go out for review through an editorial board to other profs who work in or are familiar with the field - they, in fact, may be your conpetitor, but you will never know due to the confidentiality imposed - been there, done that (on both sides of the issues). Gary www.diamondexpert.com
Posted: 12/5/2007 12:09:40 AM

P: 12/5/2007 1:57:57 PM
CaptAubrey Ideal Rock Total Posts: 862 Last Post: 3/23/2009 Member Since: 3/28/2004	SPIE is huge. According to their website, they have something like 15,000 members. Reputable scientific journals don't give much if any weight to where the authors work, and as Gary notes the reviewers usually don't know anyway.
Posted: 12/5/2007 1:57:57 PM

P: 12/22/2007 1:53:38 PM
Wink Ideal Rock Total Posts: 4,032 Last Post: 11/17/2009 Member Since: 5/4/2001	Date: 11/5/2007 8:00:50 PM Author:JohnQuixote For any who have not read it, the paper is a great overview of past and ongoing research into illumination effects associated with diamond beauty: http://www.agslab.com/spie/spie_lo_res.pdf LOL John, Why of course we have all read it.... Wink P.S. Seriously, when I was a Peter's I was priveledged to hold the actual magazine in my hands. Amazing how much space was dedicated to this study, and how much intense science was put into this! This, and the other articles in the magazine were not what I would consider typical light bedside reading! When someone says that diamond cutting is not rocket science, well, it is to me! Wink Jones GG Winfield's/High Performance Diamonds
Posted: 12/22/2007 1:53:38 PM

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