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Got idealscope images for two stones

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lookingforadiamond

Rough_Rock
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Nov 15, 2009
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I am trying to decide between these two stones. Both are 1.01 carat, one is G color and the other H.
Which one, if any of them, should I consider getting.

http://www.jamesallen.com/diamonds/H-SI1-Ideal-Cut-Round-Diamond-1248248.asp
http://www.jamesallen.com/diamonds/G-SI1-Ideal-Cut-Round-Diamond-1265689.asp

thanks for your help

CKK__1248248__.JPG
 
The JA website says the G is no longer available, is that because you have it on hold?
 
Date: 11/25/2009 11:14:55 PM
Author: yssie
The JA website says the G is no longer available, is that because you have it on hold?
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Yssie if you request an IS from JA the diamond usually goes on hold automatically.
 
Yes. They told me that both of them are eyeclean and I do have them reserved.

The gemologist that looked at them said that the H stone had very small crystal throughout but very difficult to see using a loupe. Whereas the G stone has a feather near the girdle which they could cover with a prong and a couple other inclusions that you can see under magnification but eyeclean. Overall, she said the H was a cleaner stone but the performance of G was better.

H stone has an HCA score of 1.7.
G stone has an HCA score of 1.4.
 
Date: 11/26/2009 4:43:46 AM
Author: lookingforadiamond
Yes. They told me that both of them are eyeclean and I do have them reserved.

The gemologist that looked at them said that the H stone had very small crystal throughout but very difficult to see using a loupe. Whereas the G stone has a feather near the girdle which they could cover with a prong and a couple other inclusions that you can see under magnification but eyeclean. Overall, she said the H was a cleaner stone but the performance of G was better.

H stone has an HCA score of 1.7.
G stone has an HCA score of 1.4.
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Both look good, depends really on price and colour preference.
 
After discount, G is $4770 and H is $4590. So not a big difference. The G stone says surface graining not shown. Does that mean anything?
 
Date: 11/26/2009 5:18:50 AM
Author: lookingforadiamond
After discount, G is $4770 and H is $4590. So not a big difference. The G stone says surface graining not shown. Does that mean anything?
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Not normally, this means the surface graining is insignificant and just mentioned for the sake of completeness.
 
Date: 11/26/2009 4:16:32 AM
Author: Lorelei

Date: 11/25/2009 10:54:26 PM
Author: lookingforadiamond
2nd stone
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Both images look good, do you know if these are eyeclean? Both have grade setting clouds also so check these don''t impact performance.

http://www.jamesallen.com/diamonds/H-SI1-Ideal-Cut-Round-Diamond-1248248.asp
http://www.jamesallen.com/diamonds/G-SI1-Ideal-Cut-Round-Diamond-1265689.asp
Click to expand...
Just curious, but how does one know that the cloud is the grade setter (and not the feather) with the G Si1? It doesn''t say anything about ''additional clouds not shown'' or ''the clarity grade of this diamond is based on clouds not shown.''
 
Date: 11/26/2009 8:20:21 AM
Author: Laila619



Date: 11/26/2009 4:16:32 AM
Author: Lorelei




Date: 11/25/2009 10:54:26 PM
Author: lookingforadiamond
2nd stone
Click to expand...
Both images look good, do you know if these are eyeclean? Both have grade setting clouds also so check these don't impact performance.

http://www.jamesallen.com/diamonds/H-SI1-Ideal-Cut-Round-Diamond-1248248.asp
http://www.jamesallen.com/diamonds/G-SI1-Ideal-Cut-Round-Diamond-1265689.asp
Click to expand...
Just curious, but how does one know that the cloud is the grade setter (and not the feather) with the G Si1? It doesn't say anything about 'additional clouds not shown' or 'the clarity grade of this diamond is based on clouds not shown.'
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If you look on the report Laila for the diamond, it mentions a cloud in the list of grade making inclusions-

-feather
-cloud
-indented natural.

Thus the cloud is also a grade setter. Inclusions are listed in order of significance.
 
sorry for all the questions but just curious on the star and lower length percentages. One of these is 50%/80% while the other is 55%/75%. What is ideal?
 
Either can be ideal; it depends on what you prefer. 75% could be a rounded-down 77%. 80% could be a rounded-up 78%.
50-55% star and 75-80% lower half is normal these days.
Smaller lower half makes the black arrows larger and more prominent and can increase the fire. Some people consider that prominent arrows can make a stone look slightly dark under the table.
Larger lower half makes the black arrows thinner and less prominent, with a little less fire from the stone.
 
Date: 11/26/2009 9:08:04 AM
Author: lookingforadiamond
sorry for all the questions but just curious on the star and lower length percentages. One of these is 50%/80% while the other is 55%/75%. What is ideal?
Click to expand...
It depends on the diamond, these percentages normally work for well cut diamonds generally, sometimes in some ' borderline' combos longer lower girdle facets can be preferable but it very much depends. The star and LGF basically fine tune the diamond but are not an overall deciding factor of beauty and performance.
 
Date: 11/26/2009 8:23:03 AM
Author: Lorelei
Inclusions are listed in order of significance.
Click to expand...
I didn''t know that! Thanks!
 
What is indented natural inclusion, is it something to consider when purchasing a stone. I am really leaning towards the G stone that I posted.

Anyone have any opinions on which stone I should get? I put the question into JA about whether the cloud impacts performance since it was used to determine the clarity grade.

thanks
 
Date: 11/27/2009 10:17:32 AM
Author: lookingforadiamond
What is indented natural inclusion, is it something to consider when purchasing a stone. I am really leaning towards the G stone that I posted.

Anyone have any opinions on which stone I should get? I put the question into JA about whether the cloud impacts performance since it was used to determine the clarity grade.

thanks
Click to expand...

These paragraphs are quoted from expert David Atlas concerning naturals and indented naturals.

"A natural is original surface material of the rough diamond that was never polished away in cutting. If it does not indent, it means the cutter just left a part of the original skin of the stone on the surface plane of the surrounding facets. Generally, a tiny extra facet could be placed there if one wished to do it. It would add or subtract nothing with that diamond. The weight would probalby not change more than a fraction of 1/100 of a carat.

An idented natural would be where the skin of the original diamond had a dip in it that is NOT on the plane of the surrounding facets. Removing such a blemish would require a bit more grinding and polishing. There would be somewhat more weight loss. The shape or surrounding facets would have to be altered. This can be minor or more major. We are not talking specifics here. An indented natural is generally a little valley and might be confused by someone as a chipped stone.


You can find naturals and indented naturals on diamond pavilions and crowns, never on the table. Usually they are at or on, or in the girlde, but not every time. Size, location and visibility determine how they are handled and graded. Most well cut diamonds have no naturals or only tiny ones. Most well cut diamonds would only have an indented natural in the width of the girdle, not denting the stone''s outline.


These are generalizations and don''t account for every possible case."

 
I think I would go with the H since it is cleaner and less expensive.. some day you may want a setting that cannot cover that inclusion on the girdle? I suspect that with diamonds like this the differences in performance of small and wouldn''t be noticed under normal daily wear, when the diamond is dirty and in typical lighting conditions. But having a G can be a nice mind clean thing!
 
JA said that the clouds on either stone do not impact performance. I made my decision to go with the H stone. Thanks for everyones input.
 
Date: 11/28/2009 12:07:13 AM
Author: lookingforadiamond
JA said that the clouds on either stone do not impact performance. I made my decision to go with the H stone. Thanks for everyones input.
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Congratulations!!!
 
I apologize for all the questions but I just want to learn as much as i can about what I am buying. So for the stone I chose, the depth is 62.7%, crown 16%, pav depth 43%. From what I have been reading, it seems like the total depth is too big but the HCA score is 1.7 which is good. Can someone explain to me how this can be?

thanks again
 
Date: 11/28/2009 11:47:42 AM
Author: lookingforadiamond
I apologize for all the questions but I just want to learn as much as i can about what I am buying. So for the stone I chose, the depth is 62.7%, crown 16%, pav depth 43%. From what I have been reading, it seems like the total depth is too big but the HCA score is 1.7 which is good. Can someone explain to me how this can be?

thanks again
Click to expand...
The stone is very slightly deeper but it is a well cut stone and the Idealscope is great, light return is mainly dependant on the crown and pavilion angles rather than physical depth.
 
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