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More shedding of fluorescence inner values

Texas Leaguer

Ideal_Rock
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Jul 27, 2009
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3,180
Does this appear on GIA Dossier reports at all? [I am not finding the detail among GIA writeings & have certainy not read enough of the abridged reports, yet]
I don't have a dossier report handy with that comment, but I don't see why it would be excluded from dossiers. Essentially the only thing excluded is the actual plot. And an inscription is automatically applied for identification purposes.

On second thought, that comment may always be specific to characteristics not shown on the plot, in which case it is moot if there is no plot (dossier).

It's a very good question and I will try to find out!
 
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AV_

Ideal_Rock
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@diagem
I believe both (colorless & colored) should be treated as equal on all aspects!
I understand this in this way: if cut is accepted to have a contribution to fancy colour (grades), let it also be considered so for the lettered colour grades, or neither.
 
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Texas Leaguer

Ideal_Rock
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No Bryan, cant agree with you on that one (even though it kinda make sense :cool2: ) its not that definite as you make it sound, both said features like any other optical utility of a diamond are subject to change based on time, geographic location and pluralities of lighting condition among many others...
From what I have learned, nothing is permanent in a diamonds performance no matter if in motion or still. (well maybe only in a light-less environment.).

It doesnt matter to me if it is human or nature that alters the diamonds appearance, I believe both (colorless & colored) should be treated as equal on all aspects! Its either a fancy or not or is it a colorless or not. Commanding a premium for some attributes is completely fine and justly.

But hey, I know, my thoughts are against the general consensus! :saint:
I think the essential philosophy in testing or grading is establishing a reasonable standard, and eliminating as many variables as possible in isolating the particular aspect you are testing or grading.

That is why it makes sense to grade diamonds in light that eliminates the variable that fluorescence can introduce. ( this of course is the philosophy GIA originally taught.)

With body color, in the normal range as well as fancy, the influence of cut needs to be controlled for. Cut quality can influence this test, especially in fancy colors.

Imagine the practical implications of grading fancy color face up - what would be the standard for your master stones?
 

diagem

Ideal_Rock
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@diagem


I understand this in this way: if cut is accepted to have a contribution to fancy colour (grades), let it also be considered so for the lettered colour grades, or neither.
This is the whole quote, the word “cut” is not mentioned...

It doesnt matter to me if it is human or nature that alters the diamonds appearance, I believe both (colorless & colored) should be treated as equal on all aspects! Its either a fancy or not or is it a colorless or not. Commanding a premium for some attributes is completely fine and justly.”
 
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AV_

Ideal_Rock
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This is the whole quote, the word “cut” is not mentioned...
I am not good at thinking in principle.

Is any other attribute graded by not independent rules?
 

diagem

Ideal_Rock
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Joined
Oct 21, 2004
Messages
4,929
I think the essential philosophy in testing or grading is establishing a reasonable standard, and eliminating as many variables as possible in isolating the particular aspect you are testing or grading.

That is why it makes sense to grade diamonds in light that eliminates the variable that fluorescence can introduce. ( this of course is the philosophy GIA originally taught.)

With body color, in the normal range as well as fancy, the influence of cut needs to be controlled for. Cut quality can influence this test, especially in fancy colors.

Imagine the practical implications of grading fancy color face up - what would be the standard for your master stones?
I do understand the implications, I also understand that grading color based on face-up appearance add variables when not matched with genuine body color.., what I mostly understand is that the current colored diamond grading system has eliminated a whole light-yellow segment from consumer choices. The yellow "cape" diamonds, a favorable consumer choice for centuries now practically unavailable, especially in round brilliants.
 
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