What does the GIA Symmetry grade mean?

[kimikocat]

...and how does it affect the appearance of a diamond?

Does the symmetry grade mean different things for different cuts?

I did a quick search on PS and saw a few threads talking about the symmetry grade in relation to rounds, but am curious about the symmetry grade in relation to fancy shapes, like ovals, radiants, cushions...

Lovely PSers, please help!

 

[neatfreak]

Symmetry is exactly that, how symmetrically the diamond is cut. More symmetry is a good thing, but a stone with only VG symmetry can still be nice. Depends on how picky you are with your fancy cuts.

 

[Lorelei]

Date: 10/25/2008 11:27:17 PM
Author:kimikocat
...and how does it affect the appearance of a diamond?

Does the symmetry grade mean different things for different cuts?

I did a quick search on PS and saw a few threads talking about the symmetry grade in relation to rounds, but am curious about the symmetry grade in relation to fancy shapes, like ovals, radiants, cushions...

Lovely PSers, please help!

The same principles apply with lab graded symmetry in fancy shapes - this page might help.

http://diamonds.pricescope.com/symm.asp

As Miss Neat says, it depends how picky you are, but good and above for polish and symmetry are said to look the same to the naked untrained eye.

 

[Garry H (Cut Nut)]

More serious info here
http://www.gemology.ru/cut/english/symmetry/

 

[kimikocat]

Hi Garry,

Thanks! That link is perfect. Just what I needed.

I''ve noticed that several of these articles have Russian authors -- why is that?

kimiko

 

[denverappraiser]

Date: 10/26/2008 11:57:05 AM
Author: kimikocat
Hi Garry,


Thanks! That link is perfect. Just what I needed.


I've noticed that several of these articles have Russian authors -- why is that?


kimiko

There’s some smart people in Russia.

The gemology.ru site, where you’re reading these articles, is associated with Moscow State University.

Neil Beaty
GG(GIA) ICGA(AGS) NAJA
Professional Appraisals in Denver

 

[Lorelei]

Date: 10/26/2008 11:57:05 AM
Author: kimikocat
Hi Garry,

Thanks! That link is perfect. Just what I needed.

I''ve noticed that several of these articles have Russian authors -- why is that?

kimiko

That is a GREAT link, thanks Garry * bookmarking*