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GIA cut grades and HCA...

slg47

Ideal_Rock
Joined
Apr 4, 2010
Messages
9,667
There have been a number of threads recently about stones with GIA VG or G cut grade and good HCA score.

For example, I found this one on James Allen

http://www.jamesallen.com/diamonds/D-VVS1-Good-Cut-Round-Diamond-1362056.asp
Shape: Round
Carat weight: 0.67
Cut: Good
Color: D
Clarity: VVS1
Certificate: GIA
Depth: 57.6%
Table: 60.0%
Polish: Excellent
Symmetry: Very Good
Girdle: Thin to slightly thick
Culet: None
Fluorescence: None
Measurements: 5.81*5.83*3.35

I am curious as to what stones with GIA VG/G and good HCA score will look like (obviously there could be many different types...this one seems to be an extreme of low crown/high pav)...obviously pictures tell more than numbers! what limitations are there with HCA and GIA VG/G stones?
that scores 1.4 on the HCA (BIC).
 

Garry H (Cut Nut)

Super_Ideal_Rock
Trade
Joined
Aug 15, 2000
Messages
18,422
Good and rare find!
note the usage warning page
https://www.pricescope.com/wiki/diamonds/holloway-cut-advisor
This is a stone that is great spread with no deduction there so the deuctions are all coming from light performance.
BTW it is GIA VG not Good - that must be a JA typo or internal system choice.
 

diamondseeker2006

Super_Ideal_Rock
Premium
Joined
Jan 11, 2006
Messages
58,547
Gah..but it has a 28 crown angle!!! Flat top!!!
 

Laila619

Super_Ideal_Rock
Premium
Joined
Apr 28, 2008
Messages
11,676
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