Re: What happen to all the professional jewelers on PriceSco
You did not answer on my questions.
If somebody publish statements in peer review journal, it does not mean you have to believe in to these statements without checking.
Please try to answer on my questions yourself and you most probably will reject Brilliancy definition from “Evaluation of Brilliance, Fire, and Scintillation in Round Brilliant Gemstones."
Even publications in "Nature" have critical mistakes sometimes.
MelisendeDiamonds|1416679571|3788566 said:Serg|1416676594|3788547 said:Melisende ,
How did You verify your definition of Brilliancy ?
2007 in the journal Optical Engineering, entitled “Evaluation of Brilliance, Fire, and Scintillation in Round Brilliant Gemstones." Foundational work on the project was published in Optics and Photonics News in April of 2003 entitled “The Optical Design of Gemstones." and references therein.
Serg,
I have found in the past getting into too many fine technical details all at once has not had the greatest impact on the general pricescope readership and I'm not sure it is the focus of this thread but I'll answer some of your questions briefly even though you claim my posts are "personal attacks" and are "attacking" me right now in much the same way.
Lets check you definition for simplest examples
1) 2mm and 6mm round diamonds, both have same AGS0 parameters
which diamond is more Brilliant?
Which Diamond is more Bright?
Which diamond has more ability to Return more light to the viewers eyes?
Size is an important factor especially for virtual facet size and it should be taken into consideration. The large majority of examples I have posted (with a couple notable exceptions) are within 1 - 2 ct range which is the sweet spot for "light performance branded diamonds" given cost of rough, saleability, and yield concerns.
if you see any difference in Brilliancy for these 2 diamonds and you do not see any difference in ASET images for same diamonds then you need change your statements about Brilliancy and connections between Brilliancy and ASET images.
2) compare 1ct AGS0 round diamond in static position and same diamond during tilting.
please give answers for same questions.
3) if you saw 20-50 ct round diamond with AGS0 proportions, please compare Brilliancy for such big round diamond with 1ct AGS0 RBC.
A static ASET image is not the whole story, if I am presenting I would present a simulated video with the diamonds rocking under ASET lighting. If thats not practical a few ASET images with each with tilt 5 degrees in each direction would still be instructive.
Octonus Diamcalc is extremely helpful in this regard especially for providing standardized lighting and for controlling tilt so thank-you for that.
Your personal attacks to some trade persons are not pleasant and avoid other professionals to publish them opinions.
You did not answer on my questions.
If somebody publish statements in peer review journal, it does not mean you have to believe in to these statements without checking.
Please try to answer on my questions yourself and you most probably will reject Brilliancy definition from “Evaluation of Brilliance, Fire, and Scintillation in Round Brilliant Gemstones."
Even publications in "Nature" have critical mistakes sometimes.