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"Good" symmetry doesn't look so bad?

E B

Ideal_Rock
Joined
Aug 31, 2005
Messages
9,490
This diamond has TIC numbers (0.8 HCA), and EX polish, but only "good" symmetry, earning it a VG cut by GIA. The symmetry doesn't look bad to me, and I love the fat arrows. How much do you think it'd factor?

screen_shot_2016-04-11_at_9.png
 

Karl_K

Super_Ideal_Rock
Trade
Joined
Aug 4, 2008
Messages
12,682
The labs do not grade optical symmetry which is what you can see in a picture.
What the labs grade is meet point symmetry, how well do all the facet junctions line up with one another and are they in the right place?
A diamond with a grade of good lab(meet point) symmetry could have excellent optical symmetry.
It doesn't happen that often because if the meet points are that off usually the alignment will be off also.

fwiw I would not consider that an example of excellent face up optical symmetry.
My guess is a pavilion main is responsible for both the missing arrow and the lab grade.
A full sarin scan would be interesting.
 
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