JohnQuixote
Ideal_Rock
- Joined
- Sep 9, 2004
- Messages
- 5,212
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.
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.
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