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- Sep 2, 2002
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Maybe rounds are straightforward enough. So what if GIA has what''s regarded as substandard analysis, for reasons of political correctness, or otherwise.Date: 8/2/2005 2:55:34 PM
Author: oldminer
Now, the GIA proposes to measure a few more angles and facet lengths...
You can measure until the end of time, but there is always another variable.
maxine, the answer to that would be no.Date: 8/2/2005 5:57:15 PM
Author: Maxine
Another question: If a stone is AGS0, will it most likely be a GIA exc, and vice versa?????
Are the only ones who ''make the grades'' those w/very limited cut parameters?????
I''ve been playing with the software a bit today. Gosh is your conclusion an understatement. I have some interesting examples to post tomorrow.Date: 8/2/2005 8:14:50 PM
Author: Wink
My initial take is that many, if not MOST GIA Excellents will be no where near AGS 0''s, while AGS 0''s should easily score GIA Excellents.
Wink
(Paul will slap me up side the head and correct me if I am wrong, as will Old Miner and John Quixote...)
Date: 8/2/2005 8:14:50 PM
Author: Wink
My initial take is that many, if not MOST GIA Excellents will be no where near AGS 0's, while AGS 0's should easily score GIA Excellents.
Wink
(Paul will slap me up side the head and correct me if I am wrong, as will Old Miner and John Quixote...)
strmrdrDate: 8/2/2005 11:48:30 PM
Author: strmrdr
Am I missing something?
table 56
crown 34.5
Pavilion 40.8
star 55
lower half 80%
girdle med med
polish - ex
sym - ex
Rates as only good?
I had to drop the crown under 34 to get it up to VG and no combo would hit exellent??
The revolution is in the documenting of the data.Date: 8/2/2005 10:53:03 PM
Author: denverappraiser
AGS - 0 - For stones that can get it
GIA Excellent - Most stones
GIA Very Good - Stones that the cutter thought would get excellent but didnt for some reason.
GIA Poor to Good & AGS 2-10 - Stones waiting to be sent to EGL for regrading
This is not very different from the system that''s been in place for years.
I suspect that this is not as revolutionary a change as the labs would have us believe.
Neil Beaty
GG(GIA) ISA NAJA
Independent Appraisals in Denver
Date: 8/3/2005 1:42:29 AM
Author: Dancing Fire
RG
any way,i would ask for a full 3D sarin to get all the cut info.no matter is a old/new GIA/AGS report.
Ira,Date: 8/3/2005 1:19:16 AM
Author: Regular Guy
The revolution is in the documenting of the data.
As is noted in the tutorial, 73% of diamonds are provided with docs from GIA. Presuming this doesn''t change substantially ...
As with most things, the real battle will be over the middle ground. Other things being equal, is a GIA-excellent better (meaning more saleable) than an AGS-3? How about a GIA-good vs. an EGL-nothing? What about Imagem and the other labs that barely make the radar right now? I don’t know but this is the competitive area for the labs. More and more customers are demanding lab services and the while the percentage of stones accompanied by a report is increasing, the percentage those reports that are issued by GIA is going down. I think this is a big part of the reason that GIA is being so slow to introduce the new system. It’s almost impossible for them to win. If the category of ‘excellent’ is to narrow, their customers will flee to AGS and if it’s too broad the consumers will consider it useless. The best option is to drag their feet as long as possible.
Does anyone know if the diamond dossier reports will also include the cut grade?
Date: 8/3/2005 9:34:56 AM
Author: Detox
I can honestly say I wish I didn''t read this thread.
I am so close to purchasing a GIA EX, EX diamond with proportions that score under 2 on the HCA. These proportions are similar to those listed above. I am sure my diamond is a performer, but of course having not seen it yet, it creates one more thing to question.
Of course the scientist side of me wants to investigate further. Most lilely after the purchase.
Hey Storm,Date: 8/2/2005 11:48:30 PM
Author: strmrdr
Am I missing something?
table 56
crown 34.5
Pavilion 40.8
star 55
lower half 80%
girdle med med
polish - ex
sym - ex
Rates as only good?
I had to drop the crown under 34 to get it up to VG and no combo would hit exellent??
Date: 8/3/2005 11:02:16 AM
Author: Paul-Antwerp
Hey Storm,Date: 8/2/2005 11:48:30 PM
Author: strmrdr
Am I missing something?
table 56
crown 34.5
Pavilion 40.8
star 55
lower half 80%
girdle med med
polish - ex
sym - ex
Rates as only good?
I had to drop the crown under 34 to get it up to VG and no combo would hit exellent??
I suppose that you left the total depth at 60%. It took me about four double-clicks, but then, you can adjust the total depth.
From 60.6% and higher, this proportion-set will be Excellent.
Live long,
This is very interesting Paul. Funny but when I do my searches I punch in depths that range from 60.6 - 62.2%.Date: 8/3/2005 11:02:16 AM
Author: Paul-Antwerp
Hey Storm,Date: 8/2/2005 11:48:30 PM
Author: strmrdr
Am I missing something?
table 56
crown 34.5
Pavilion 40.8
star 55
lower half 80%
girdle med med
polish - ex
sym - ex
Rates as only good?
I had to drop the crown under 34 to get it up to VG and no combo would hit exellent??
I suppose that you left the total depth at 60%. It took me about four double-clicks, but then, you can adjust the total depth.
From 60.6% and higher, this proportion-set will be Excellent.
Live long,
Date: 8/3/2005 1:44:48 PM
Author: strmrdr
Date: 8/3/2005 11:02:16 AM
Author: Paul-Antwerp
Hey Storm,Date: 8/2/2005 11:48:30 PM
I suppose that you left the total depth at 60%. It took me about four double-clicks, but then, you can adjust the total depth.
From 60.6% and higher, this proportion-set will be Excellent.
Live long,
Your right.
I tried about a dozen times to change the depth and it wouldnt budge.
But at 60% depth why are they knocking it down?
According to diamcalc its no problem?