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 HELP RIGHT AWAY NEED ANSWER TO THESE QUESTIONS ASAP!
P:  2/6/2004 6:59:18 PM  
chowchow99
chowchow99

Rough Rock
Total Posts: 21
Last Post: 4/9/2004
Member Since: 12/17/2003
 
 		please advise on this stone ASAP.
This is GIA cert.

2.79 carats
D color and VS1 clarity
Crown is 33.9 14.4%
Depth is 61.5
Table is 57.1
Pavilion is 43% 40.8
Culet is 0.4
Girdle is Slightly thick
Polish is VG
Symmetry is ex

What about the brilliance and fire and scintilization of this stone?
Diam-calc?
Light return?
Spread?
Could this be sent out to AGS and come back with a triple zero?
What is a fair price for this stone?
I may purchase it on Monday so I need these questions answered ASAP and in full.
Thanks
Posted:  2/6/2004 6:59:18 PM

 There are 8 replies to this message.  There are 8 replies on this page.
P: 2/6/2004 8:46:50 PM
diamondnovice
diamondnovice

Cut Rock
Total Posts: 123
Last Post: 3/18/2004
Member Since: 9/29/2002
 
 		I can't answer all your questions but as for the stone, it looks great. It should be a very good performer. The proportions are considered "ideal" and score well on the HCA (1.1 TIC) Despite the ideal proportions, this would probably not grade as an AGS 000. AGS terms are different than GIA. GIA "excellent" symmetry and polish are classified as "ideal" by AGS and GIA "very good" are classified by AGS as "excellent". To be an AGS 000, the proportions, symmetry and polish all need to be ideal. Your polish would be considered "excellent" (IF AGS graded the stone equivalently as GIA) making this stone an AGS 1. Since polish does not drive light return, it is not an issue to have an excellent polish. In fact, the stone should cost slightly less than an equivalent AGS 000.

Hope this bit helps.

Posted:  2/6/2004 8:46:50 PM
P: 2/7/2004 12:58:44 PM
valeria101
valeria101

Ideal Rock
Total Posts: 14,048
Last Post: 4/30/2006
Member Since: 8/29/2003
 
 		Why doesn't this look like a purchase one should rush about to me?

The numbers sound great, but they are by far not enough to qualify the look of a stone. Excellent polish has precious little to do with any perceivable quality and nothing with the optical properties of the stone. Same for Ex symmetry - VG is already out of the ordinary and more than enough to insure optical performance. Ex polish not only no one can tell without lab gear, but also wears off.

Unless you buy these rocks every week to play with, I would not move it off the counter without some direct analysis of the optical quality of this gem: not by numbers, in person. As little as the knowledgeable handling of an IdealScope would do (so appraisal during return period comes to mind) and there are less handling-intensive tools out there (B-scope, Isee2, who knows what else?). Light return (and the rest of optics) cannot be evaluated without info on minor facets. Also, it is far better to work with the stone than those numbers.

The thick girdle makes any "cut grading by numbers", including the HCA, imprecise. For example, the HCA assumes a different (thin or medium?) girdle width. Thin to medium is considered desirable. If the one on your stone is not only thick, but uneven (as most of thick girdles are) the stone can depart a good mile from the optical performance of a great cut. Just a warning: these numbers and specs are not above all concern.

If this is meant to be a top stone (which you seem to be looking for), let it be, all the way, light return and brilliance included

Ana "The greatest experts are only as good as the sum total of what they have seen." [Souren Melikian]
Posted:  2/7/2004 12:58:44 PM
P: 2/7/2004 1:14:22 PM
valeria101
valeria101

Ideal Rock
Total Posts: 14,048
Last Post: 4/30/2006
Member Since: 8/29/2003
 
 		What is the diameter? This may help get a better idea on exaclty how thick is "slightly thick"...

Ana "The greatest experts are only as good as the sum total of what they have seen." [Souren Melikian]
Posted:  2/7/2004 1:14:22 PM
P: 2/12/2004 8:01:02 AM
chowchow99
chowchow99

Rough Rock
Total Posts: 21
Last Post: 4/9/2004
Member Since: 12/17/2003
 
 		Could someone show me a Diam-Calc on this stone?
The measurementare 9.02 x 9.09 x5.56...
Thanks

Posted:  2/12/2004 8:01:02 AM
P: 2/12/2004 8:26:51 AM
aljdewey
aljdewey

Ideal Rock
Total Posts: 8,236
Last Post: 2/11/2008
Member Since: 11/25/2002
 
Chow.......why do you want to see a Diamond Calc now......according to your VERY URGENT, CAPITALIZED post, you had to make a decision on this stone this past Monday.
 
 

_____________________
Note: Chainsaw Not Sold Separately.
Posted:  2/12/2004 8:26:51 AM
P: 2/12/2004 11:56:34 AM
chowchow99
chowchow99

Rough Rock
Total Posts: 21
Last Post: 4/9/2004
Member Since: 12/17/2003
 
 		I did make a move on Monday and had the stone sent out to an independant appraiser but I do want to see what the Diam-Calc looks like.
Can anyone help me out?

Posted:  2/12/2004 11:56:34 AM
P: 2/12/2004 11:58:59 AM
iknowquinn
iknowquinn

Rough Rock
Total Posts: 63
Last Post: 5/6/2004
Member Since: 2/12/2004
 
 		what price were they asking for this stone??

Posted:  2/12/2004 11:58:59 AM
P: 2/12/2004 12:22:14 PM
Rhino
Rhino

Ideal Rock
Total Posts: 4,865
Last Post: 11/22/2009
Member Since: 3/29/2001
 
It is impossible to assess all the properties you are asking for (brilliance, fire, scintillation) without a physical analysis of the stone.  There is alot of information missing such as
  • variances between crown/pavilion angles and table %.
  • lower girdle facet length (which can and does influence fire/scintillation and can change the appearance of the stone dramatically)
  • star facet length
  • upper girdle angles

I can hop on another computer and give you a diamcalc but the chances are it could be nowhere near what this stone is.  When we punch in numbers manually into the DiamCalc it makes the stone appear to have perfect or near perfect optical symmetry which is a result of tight variances ON ALL the major and minor facets.  We inspect hundreds of diamonds and common stones just simply do not have that degree of precision which is why we prefer to show a DiamCalc based on an actual scan of the diamond itself.  Judging from the data given the stone would not get an AGS "0" ideal cut because of the polish rating.

Rhino
Good Old Gold
Posted:  2/12/2004 12:22:14 PM

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