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would you be interested in a A IF stone ?
Date: 1/22/2005 50:18 PM![]()
Author:Dancing Fire
would you be interested in a A IF stone ?
Date: 1/22/2005 6:505 PM![]()
Author: sahmama
yeah, but why did GIA decide to start with D as opposed to A? just seems weird to go from D-Z instead of A-Z...
Date: 1/22/2005 74:36 PM![]()
Author: websailor
Perhaps the ''D'' was picked because they were grading D iamonds?
Love it.Date: 1/22/2005 71:24 PM![]()
Author: perry
GIA did not want any confusion. By using letters never before used, there would be no confusion with the previous system.
A modern example of such confusion is the term ''Ideal Cut'' Everyone and their sister has a different deffinition of Ideal Cut (it is amazing just how many diamonds are sold as ''Ideal Cut''). Thus, if I were to start a new cut grading system, I would avoid the term ''Ideal.''
Here''s my idea of a cut standard system:
Amazing (almost perfect - within a few tenths of perfect,
Less than 1/10 of 1% of diamonds.)
Great
Good
Fair
Poor
Awful
Perry
I believe AGS Ideal 0/Ideal Cut/AGS000/Triple Zero means the highest rating in polish, symmetry and proportions. It has nothing to do with colour and/or clarity.Date: 1/22/2005 5:29:46 PM
Author: JohnQuixote
AGS also includes number grades on their DQDs, and you may be aware that AGS has a number for color and clarity (as well as cut). An AGS 000 actually infers a diamond with Ideal Cut (0) and D Color (0) which is flawless (0).
agree with john...Date: 1/22/2005 5:29:46 PM
Author: JohnQuixote
Date: 1/22/2005 50:18 PM![]()
Author:Dancing Fire
would you be interested in a A IF stone ?
Actually, people were. There were even AA stones. Before the GIA D-Z color grading scale there were a variety of other symbols used... A, B, C, 0, 1, 2, 3, I, II, III, etc. AA was used to one-up the others. Adjectives were even used... ''Blue-White,'' etc. There were no clear definitions.
When GIA created their color scale they did not want their symbols to have any association with prior systems. Thanks to the reputability and global understanding of GIA''s system others have since been modeled thusly.
AGS also includes number grades on their DQDs, and you may be aware that AGS has a number for color and clarity (as well as cut). An AGS 000 actually infers a diamond with Ideal Cut (0) and D Color (0) which is flawless (0).
Date: 1/22/2005 11:54:20 PM
Author: dobie
I see lots of websites saying their diamonds are Ideal Cut or Triple Zeros with all grades of colors and clarities.
I see that you used the word 'cut' for proportion. So is 'Ideal Cut' just ideal in proportion only or ideal in proportion, symmetry AND polish?Date: 1/23/2005 12:348 AM![]()
Author: JohnQuixote
Dobie - you're right. It is commonly misconstrued. The appropriate term for ideal in cut, sym and polish is 'Triple ideal.' As VKT mentioned, you can have a G SI stone which is 'Triple Ideal' in cut...But the original AGS 000 is D FL.
Date: 1/23/2005 12:57:52 AM
Author: dobie
I see that you used the word 'cut' for proportion. So is 'Ideal Cut' just ideal in proportion only or ideal in proportion, symmetry AND polish?
ETA: What is confusing is that in the quote I got from AGS they used 'Ideal Cut' to include cut, color and clarity.
DobieDate: 1/23/2005 12:57:52 AM
Author: dobie
I see that you used the word ''cut'' for proportion. So is ''Ideal Cut'' just ideal in proportion only or ideal in proportion, symmetry AND polish?Date: 1/23/2005 12:348 AM![]()
Author: JohnQuixote
Dobie - you''re right. It is commonly misconstrued. The appropriate term for ideal in cut, sym and polish is ''Triple ideal.'' As VKT mentioned, you can have a G SI stone which is ''Triple Ideal'' in cut...But the original AGS 000 is D FL.
ETA: What is confusing is that in the quote I got from AGS they used ''Ideal Cut'' to include cut, color and clarity.
I quoted the statement in my post above. You can see it in the popup to one of the FAQs here:Date: 1/23/2005 2:45:52 AM
Author: JohnQuixote
Can you link the AGS statement you found?
So you and John are both saying an AGS 000 can have non-ideal symmetry and polish? Seems to me the word cut can refer to the proportion or proportion, sym and polish.Date: 1/23/2005 2:577 AM![]()
Author: Dancing Fire
you could have a stone that is'' ideal cut'' without ideal symmetry or polish.
There are many standards for ideal cut from many different groups, ingluding GIA and AGS. For a stone to be an AGS "IDEAL" and received the vaunted AGS tripple 0 cut grade it must have ideal rankings on all three, proportions, polish and symmetry. If it has for example "only"excellent or very good then the highest cut grade it can receive is the lowest of the grades received. Thus a stone could have Ideal proportions, Excellent polish and Fair symmetry and the cut grade the stone would receive would be Fair.Date: 1/23/2005 12:57:52 AM
Author: dobie
I see that you used the word ''cut'' for proportion. So is ''Ideal Cut'' just ideal in proportion only or ideal in proportion, symmetry AND polish?Date: 1/23/2005 12:348 AM![]()
Author: JohnQuixote
Dobie - you''re right. It is commonly misconstrued. The appropriate term for ideal in cut, sym and polish is ''Triple ideal.'' As VKT mentioned, you can have a G SI stone which is ''Triple Ideal'' in cut...But the original AGS 000 is D FL.
ETA: What is confusing is that in the quote I got from AGS they used ''Ideal Cut'' to include cut, color and clarity.
JohnDate: 1/23/2005 110:59 PM![]()
Author: JohnQuixote
Dobie, 2 things...
1. Thank you for the link - very helpful. I'm not sure when AGS changed their position on this, but your version of what they are saying is correct. It appears they have now begun to acknowledge 'Triple Zero' as a stone with ideal proportions, sym and polish. This is different than the historical interpretation.
2. As Wink observed from Chile, it's all very muddled. The forthcoming cut grading systems from GIA and AGS will likely create even more muddle.
Therefore, my advice to you is to learn the different methods for assessing the proportions numbers (whether that's going by AGS' interp, a preferred vendor's interp or your own interpretation of what's 'ideal.'
Date: 1/24/2005 12:34:51 AM
Author: Dancing Fire
John
i don''t understand how can a stone be call ''triple 0'' when there is only 1 zero printed on the cert, 99% of the time for( 0 cut only).i still say a ''triple 0'' should have 0 cut + D color + IF clarity.....now if the stone also has perfect H&A its call a..... ''QUAD 0'' stone.