How is this stone spec / price?

[GDTRFB]

.7 G VS2 (cloud and feather - eye clean); depth - 62.3, table - 57; excellent in everything, H&A, ~$2500.

 

[stone-cold11]

What are the angles, star and lower girdle facet numbers?

 

[Lorelei]

Date: 9/14/2009 8:28:30 PM
Author:GDTRFB
.7 G VS2 (cloud and feather - eye clean); depth - 62.3, table - 57; excellent in everything, H&A, ~$2500.

The critical crown and pavilion angles are needed please, type of grading report and images of both hearts and arrows as it is sold as such.

 

[GDTRFB]

Ah, sorry guys!! Here it is...

Diameter - 5.67 mm
Depth - 62.5%
Table - 57.4%
Crown - 35.3
Pavil - 41.2
Cutlet - 0.3%
Girdle - 2.1%

Just did a cut analysis and it came out to a 4.2, not that great. Hmmm, they rated this as one of their preferred stones...did I get this number right?

 

[stone-cold11]

If the numbers is right, that does not look good.
Who graded this stone?

 

[Lorelei]

Date: 9/15/2009 10:46:32 AM
Author: GDTRFB
Ah, sorry guys!! Here it is...

Diameter - 5.67 mm
Depth - 62.5%
Table - 57.4%
Crown - 35.3
Pavil - 41.2
Cutlet - 0.3%
Girdle - 2.1%

Just did a cut analysis and it came out to a 4.2, not that great. Hmmm, they rated this as one of their preferred stones...did I get this number right?

Its what we call a steep deep, light leakage is often the result of that angle combo, which lab graded this diamond please? Also need the diameter measurement for the sake of completeness. Might be an idea to check your numbers, in the first post you noted the depth was 62.3%

 

[GDTRFB]

I did note 62.3 - that is what is listed on the vendor''s site, but the certificate lists 62.5!

Certificate is from GIA - they rated it an ''excellent'' cut grade.

Diameter is 5.67mm.

 

[GDTRFB]

I *think* I attached the report

 

[Lorelei]

Thanks! I would personally keep looking, you can do better than this one, the angle combo is too risky for me.

 

[stone-cold11]

Ok, you are getting mixed up. The profile diagram of the diamond is the proportion as measured by GIA. The numbers on the chart looks like the output of a Sarin scan using the outdated AGS grading matrix.

GIA Ex cut grade allows for steep/deep combination, which this stone is a prime example.

 

[GDTRFB]

Thank you! I will stop back here again with another one for advice soon!

 

[GDTRFB]

Interesting...this stone was graded in June 2009!

 

[Lorelei]

Date: 9/15/2009 11:37:39 AM
Author: GDTRFB
Interesting...this stone was graded in June 2009!

You see that quite a lot, sometimes even diamonds which have been graded a couple of weeks or so!

 

[stone-cold11]

Date: 9/15/2009 11:37:39 AM
Author: GDTRFB
Interesting...this stone was graded in June 2009!

This is because the Sarin machine is private, the vendor''s probably, and the software is not updated.

 

[GDTRFB]

When you say profile diagram versus the chart...is the profile diagram the 'picture' of the diamond and the angles/measurements, and is the chart the table of measurements on the lower left part of the certificate?

And the chart is what is populated by the vendor themselves through their own machine?

And on some stone's GIA certificates, the chart in the lower left isn't even there. Why is that?

Bottom line, always go by the 'picture' of the diamond on the right side of the report for measurements?

 

[stone-cold11]

Date: 9/15/2009 12:01:05 PM
Author: GDTRFB
When you say profile diagram versus the chart...is the profile diagram the 'picture' of the diamond and the angles/measurements, and is the chart the table of measurements on the lower left part of the certificate?

And the chart is what is populated by the vendor themselves through their own machine?

And on some stone's GIA certificates, the chart in the lower left isn't even there. Why is that?

Bottom line, always go by the 'picture' of the diamond on the right side of the report for measurements?

Yap, the chart on the bottom left is produced by the vendor's sarin machine.

Check out the GIA report from other online vendors. For example this. http://www.jamesallen.com/diamonds/D-VS1-Ideal-Cut-Round-Diamond-1260984.asp

This is what the original GIA Diamond Dossier report looks like. The chart is stick onto the report, it is not part of the report.

 

[Lorelei]

Date: 9/15/2009 12:01:05 PM
Author: GDTRFB
When you say profile diagram versus the chart...is the profile diagram the ''picture'' of the diamond and the angles/measurements, and is the chart the table of measurements on the lower left part of the certificate?

And the chart is what is populated by the vendor themselves through their own machine?

And on some stone''s GIA certificates, the chart in the lower left isn''t even there. Why is that?

Bottom line, always go by the ''picture'' of the diamond on the right side of the report for measurements?

You are right that the GIA report is dated in June 09 if that is what you are alluding to, this is not uncommon so no need to worry.

 

[GDTRFB]

Awesome, thank you!

 

[GDTRFB]

OK, now this is a better looking stone, right!?

 

[stone-cold11]

Yap, this looks better.

 

[Lorelei]

Date: 9/15/2009 12:20:52 PM
Author: GDTRFB
OK, now this is a better looking stone, right!?

By the numbers, yes.

 

[GDTRFB]

Does the depth appear to be shallower than ideal or will that make the top larger in appearance?

Is the crown angle anything to be worried about?

Anything else I should be worrying about in regards to anything but the measurements - where the inclusions are, etc.?

 

[Lorelei]

Date: 9/15/2009 12:49:52 PM
Author: GDTRFB
Does the depth appear to be shallower than ideal or will that make the top larger in appearance?

Is the crown angle anything to be worried about?

Anything else I should be worrying about in regards to anything but the measurements - where the inclusions are, etc.?

Depth is fine, so is the crown angle, it is a hair shallower than some prefer but it could be a great looking rock, geared more toward brilliance than fire. VS2 inclusions in this size diamond shouldn't be an issue.

 

[GDTRFB]

Sorry, still learning here - more brilliance than fire...can you explain a little more?

 

[jet2ks]

Thritto that the second stone's numbers look good

Brilliance = white light return

Fire = colored spectral light

A diamond with a shallower crown angle generally has less ability to refract the light exiting the diamond into spectral colors. In most situations you will probably never notice, as the overall cut looks good--the Sarin scan shows the angles more precisely (if the machine has been calibrated) than GIA's rounded numbers. It should still be a bright and lively diamond.

 

[stone-cold11]

Near tolk proportion for the crown is from 33.5-35 degrees.

 

[GDTRFB]

Great, thanks again everyone!

 

[GDTRFB]

How does this stone look? The problem is, I am stepping down from G to an H, and I can see the differences when I looked at G versus H, however, the retailer doesn''t have a lot of G''s that are falling within good scores...

.76 H VS2 - score is great, but GIA report says Very Good cut grade - just wondering why this isn''t excellent?

 

[stone-cold11]

This is a bit shallow in the pavilion, might have obstruction issue. I would prefer the previous stone.

 

[GDTRFB]

Me too! Of course it was on hold when I found it!