GIA Crown and Pavilion angles

[iceyone]

how can someone determine these if their stone is GIA cert and not AGSL?

 

[JohnQuixote]

Edited to reflect: Just re-read the subject and realize you were looking for crown and pavilion on the GIA cert. They will not be on the GIA cert, only on the AGS. In short, GIA will include a plot of the stone showing inclusions. AGS will include that plot as well as a side-view of the stone showing cut proportions.

 

[JohnQuixote]

Found these on the 'net (random examples)

GIA Grading Report

 

[JohnQuixote]

AGS Grading Report (Diamond Quality Document)

 

[strmrdr]

Date: 11/24/2004 8:13

4 PM
Author:iceyone
how can someone determine these if their stone is GIA cert and not AGSL?

Have the vendor or an appraiser run a sarin/ogi scan on the diamond is the only way.

 

[JohnQuixote]

In some cases
AGS provides a "Diamond Quality DOCUMENT"
rather than a "Diamond Quality REPORT"
The Diamond Quality Document is usually associated with ideal cut proportions along with ideal polish and symmetry.

 

[JohnQuixote]

If you have a GIA grading report the only way to acquire cut proportions is to have the jeweler run a Sarin or Ogi Megascope scan. That scan will give you everything you need to assess the cut quality and estimated visual performance.

 

[iceyone]

I don''t see crown/pavilion angles on GIA certs. I know AGS has them but how should I get them for a GIA cert stone?

 

[hoorray]

You will not find crown and pavilion angles or %''s on the GIA report. They currently only provide table and depth. You have to ask the vendor for a sarin or OGI report. These reports will give you the additional cut information that GIA doesn''t.