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GIA Cert and HCA scores

desertgirl

Rough_Rock
Joined
Nov 19, 2014
Messages
17
Thoughts on whether or not a GIA diamond graded "very good" cut, "very good" polish and "excellent" symmetry and scores 1.0 on HCA should be considered? I"ve come across so many GIA "excellent" graded cuts that score way to high on the HCA tool and are rejects. Thoughts anyone?
 

desertgirl

Rough_Rock
Joined
Nov 19, 2014
Messages
17
Here are the stats:
E color medium blue flouresence 1.03 medium to thick faceted girdle

59% table
60.4 depth
34 crown angle
40.6 pavilion angle
6.50 x 6.51 3.93 mm
 

lil2181

Rough_Rock
Joined
Oct 13, 2014
Messages
21
Hello,
Do you have the GIA certificate?
 

yssie

Super_Ideal_Rock
Premium
Joined
Aug 14, 2009
Messages
27,265
Yes, some GIA VGs can certainly be beautiful stones worth considering! Just as many PSers would reject some GIA EXs. Stones really do have to be evaluated individually.

http://www.gia.edu/cs/Satellite?reportno=5186491637&childpagename=GIA%2FPage%2FReportCheck&pagename=GIA%2FDispatcher&c=Page&cid=1355954554547

In this case the Thick girdle is an immediate demotion to VG. Overly thick girdles are undesirable because they hide weight: they don't contribute to spread or to improving light return. Slightly-overly-thick girdles aren't, however, detrimental to light return... very thick girdles are unsightly, entrap colour, and can create some odd windowing effects (because on tilting the stone the crown and pavilion facets are skewed into an offset, vs. "meeting" at the "girdle plane"...)

No flags in the numbers otherwise
 

TitanCi

Brilliant_Rock
Joined
Apr 23, 2012
Messages
738
^what yssie said.

Hi yssie!
 

yssie

Super_Ideal_Rock
Premium
Joined
Aug 14, 2009
Messages
27,265
Hey! :wavey:

Long time!! :bigsmile:
 

Diamondbug

Brilliant_Rock
Joined
Jul 23, 2009
Messages
977
This is a stone I was considering. It is a GIA very good cut and I would buy it in a New York minute. It sold before I could pulled the trigger... I am still sad for the one that got away. ;(

http://www.goodoldgold.com/diamond/12333/
 

yssie

Super_Ideal_Rock
Premium
Joined
Aug 14, 2009
Messages
27,265
Diamondbug|1416933781|3790265 said:
This is the stone I was considering. It is a GIA very good cut and I would buy it in a New York minute. It sold before I could pulled the trigger... I am still sad for the one that got away. ;(

http://www.goodoldgold.com/diamond/12333/


Oh, that's lovely - marked down for polish, apparently.
But... the good thing about diamonds, and the people selling diamonds... they always have more to sell! I'm completely confident that you'll find the right one for you :bigsmile:

A PSer wanted to sell a GIA VG some months ago that spawned quite a long thread - the reason for demotion wasn't apparent from the report. That was an interesting stone ::) Let me see if I can dig it up...

ETA:
Here! [URL='https://www.pricescope.com/community/threads/help-not-sure-how-much-where-to-sell-my-diamond.192768/']https://www.pricescope.com/community/threads/help-not-sure-how-much-where-to-sell-my-diamond.192768/[/URL]
 

lil2181

Rough_Rock
Joined
Oct 13, 2014
Messages
21
Hi DesertGirl,

Just for future reference. If a diamond's looks good overall based on proportions with Excellent symmetry/polish. That means there are 2 likely possibilities for it to be graded as Very Good.

1) The girdle is thick.
2) This diamond didn't display fire/brilliance to a standard that achieved Excellent standards during observational analysis.

Hope this helps.
 

desertgirl

Rough_Rock
Joined
Nov 19, 2014
Messages
17
Thank you all! Interesting stuff! Is "slightly thick" ok???
 

TitanCi

Brilliant_Rock
Joined
Apr 23, 2012
Messages
738
^should be ok, you don't want a thick girdle because that's where some of the weight is- which is bad.
 
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