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Ideal cut for GIA certified diamonds?

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mclapham

Rough_Rock
Joined
Nov 1, 2004
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13
Given that we don't have crown/pavillion data for a GIA certified diamond, how do you determine whether its an ideal cut. Is the table/depth ratio sufficient along with looking at the symmetry and polish and culet, girdle?

Would this classify as ideal:
Depth: 60-62
Table:55-57

symmetry/polish of at least v.good


Culet: None, pointed, v.small, small, medium
Girdle: thin, med, slightly thick

Going to an independent jeweller, they only show me the GIA certificate, and all of them say its ideal if it meets the above specs. They don't have any other certifications.
 

Patty

Ideal_Rock
Joined
Dec 7, 2003
Messages
4,054
You cannot tell if a GIA certified diamond is an ideal cut unless you also have a Sarin report. The Table and Depth ranges that you quote are a good start, though!
 

aronsh

Rough_Rock
Joined
Nov 1, 2004
Messages
12
I am no expert, but I believe the only lab that can certify an ideal cut is the AGS lab
 

irish

Rough_Rock
Joined
Nov 3, 2004
Messages
5
I''m looking at a Princess cut diamond. The Table is 75% and the Depth is 69.7. Can you tell me if it is in good proportions ? Thanks
 
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