Polish and Symmetry Grading Good- on GOG AVC

[CushionNovice]

If GOG AVC''s are produced for the best optics, fire etc - can someone explain to me how they can have stones that are graded ''good'' in Polish and ''good'' in Symmetry? Can a AVC with only Good P&S grading still be gorgeous?? I''ve been doing a bit of homework and was a little confused on this one... Can anyone simply explain it??
Cheers lovelies

 

[Lorelei]

Date: 3/28/2010 9:37:58 PM
Author:CushionNovice
If GOG AVC's are produced for the best optics, fire etc - can someone explain to me how they can have stones that are graded 'good' in Polish and 'good' in Symmetry? Can a AVC with only Good P&S grading still be gorgeous?? I've been doing a bit of homework and was a little confused on this one... Can anyone simply explain it??
Cheers lovelies

Absolutely.

Polish and symmetry are details of finish, more important to overall beauty are the overall proportions, these are what drive the light return and produce the sparkle and beauty you see. The AVC are a branded cut which are exclusive to GOG as you know, Jon could probably go into a much better explanation concerning the polish and symmetry grades of these diamonds than we can and he is actually the best person to discuss it with as you would be getting this info straight from the horse's mouth so to speak, rather than us consumers making assumptions on his creation. But suffice to say, the polish and symmetry grades will not have a detrimental effect on the beauty of the diamond and the overall cutting and potential grades of finish will have been considered carefully in the creation of each stone.

More on Polish and Symmetry from the Pricescope Tutorial.

 

[Paul-Antwerp]

For such a ''novelty''-cut like the AVC, I would say that it is entirely possible that some stones only get Good on Symmetry and/or Polish. It could well be that because of the specific needs of the design, one or a few facets are close to the natural grain of many rough crystals. This means that these facets often cannot get a better Polish.

The same reason could cause lesser Symmetry too, with the cutter trying to fix the polish-problem by approaching these facets differently resulting in a lesser point-symmetry there.

This is entirely possible and not really surprising.

Labs generally add a small plot to the diamond, showing where the polish/symmetry problems occur, and generally, it is limited to one or two facets.

In a traditional round-brilliant however, the care of cutting a great proportion-combo does generally not coincide with the lesser care of only getting good polish and/or symmetry. Here, I would say that it is a red flag.

Live long,

 

[CushionNovice]

Many thanks for the explanation! cheers!