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axiochris

Rough_Rock
Joined
Mar 31, 2010
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Hello everyone,

I am so glad i found this site. its opened up a whole new world to me. Anyways, i have narrowed down my search for an engagement diamond to an 1.50 carat F SI1 with the best possible cut i can afford. I would like the set my budget at 12K.

I have found a diamond with potential. Please let me know what you think. I have obtained an idealscope image from James Allen but its my first time reading one. Is that lighter center ring a cause for concern? Can i get some expert opinions?

Carat weight: 1.51
HCA Score: 1.60
Cut: Ideal
Color: F
Clarity: SI1
Certificate: GIA

Depth: 62.4%
Table: 56.0%
Crown Angle: 35
Pavilion Angle: 40.8
Polish: Excellent
Symmetry: Excellent
Girdle: Medium to slightly thick
Culet: None
Fluorescence: None
Measurements: 7.31*7.34*4.57

James Allen Link


Thanks everyone

Idealscope 1.51.jpg
 
nope, looks good.

Did JA confirm it is eye-clean?
 
Here is their response...


My gemologist had a chance to review this diamond and she feels it is a very well made, bright diamond. The diamond is a great SI1, because the inclusion located on the table is not visible to the naked eye. She definitely recommends this diamond if you are looking for an outstanding cut, resulting in a very luminous diamond.

There is a feather that could be seen on the JA link as well as the idealscope. What effect will that have. Any structural issues?

Also i looked at IS images of H&A diamonds. It doesnt look too different from the IS image of this one. What are the differences between this IS image and a H&A image?? Im still trying to learn to read them.
 
Date: 4/12/2010 11:28:57 PM
Author: axiochris
Here is their response...



My gemologist had a chance to review this diamond and she feels it is a very well made, bright diamond. The diamond is a great SI1, because the inclusion located on the table is not visible to the naked eye. She definitely recommends this diamond if you are looking for an outstanding cut, resulting in a very luminous diamond.

There is a feather that could be seen on the JA link as well as the idealscope. What effect will that have. Any structural issues?

Also i looked at IS images of H&A diamonds. It doesnt look too different from the IS image of this one. What are the differences between this IS image and a H&A image?? Im still trying to learn to read them.
Click to expand...

Probably not a problem with the feather with a SI1 stone, but you can ask JA about it.

IS images can be the same with a H&A, idealscope image demonstrate light return, H&A is a stone with good optical symm. A stone with good light return not necessary need to have good optical symm and vice versa, so check for both if you want a H&A. For a H&A, we will need to see the hearts image which shows the optical symm from the pavilion view, while the arrows image shows the optical symm from the crown view which is approximately what we see with a idealscope image. Since we do not have the hearts image for this stone, no idea if it has as great a optical symm from the pavilion as as a H&A.
 
Date: 4/12/2010 11:28:57 PM
Author: axiochris
Here is their response...


My gemologist had a chance to review this diamond and she feels it is a very well made, bright diamond. The diamond is a great SI1, because the inclusion located on the table is not visible to the naked eye. She definitely recommends this diamond if you are looking for an outstanding cut, resulting in a very luminous diamond.

There is a feather that could be seen on the JA link as well as the idealscope. What effect will that have. Any structural issues?

Also i looked at IS images of H&A diamonds. It doesnt look too different from the IS image of this one. What are the differences between this IS image and a H&A image?? Im still trying to learn to read them.
Click to expand...
Your image looks good. H&A generally have perfect optical symmetry which is responsible for the patterning of both hearts and arrows, some non h&a stones can also have excellent optical symmetry but won't quite meet the strict standards to be considered a ' true' h&a. So for those that don't need picture perfect h&a patterning but enjoy a good arrow pattern, then these diamonds can make an excellent choice. Also bear in mind because a diamond has good optical symmetry doesn't guarantee it is going to have top light return, although many diamonds with top OS do also have top LR it isn't always the case so evaluate each diamond carefully on its own desirable visual and physical properties.

Read more on cut precision from this tutorial,

http://www.highperformancediamonds.com/index.php?page=education-precision
 
Thanks for the great responses.

In terms of light performance, what other images can i possibly requests from JA besides the IS image.
 
You can also request an ASET.
 
ohhhh, i just thought of another thing. I was told and i think read on here that inclusions do not affect the light performance. I can clearly see that the feather inclusion is white on the IS image. That means that line (feather) is leaking light. Did i read or was i informed wrong?
 
Date: 4/13/2010 11:35:56 AM
Author: axiochris
ohhhh, i just thought of another thing. I was told and i think read on here that inclusions do not affect the light performance. I can clearly see that the feather inclusion is white on the IS image. That means that line (feather) is leaking light. Did i read or was i informed wrong?
Click to expand...
I think JA only provide ASET for fancy shapes but you can ask them. As for the feather the best thing to do would be to consult one of the gemologists.
 
Date: 4/13/2010 10:44:12 AM
Author: Lone_Wolfe
You can also request an ASET.
Click to expand...
Actually, no, JA only sent out ASET for fancy shapes and IS for round. You cannot ask for an ASET for round or an IS for fancy. This is to prevent their staff from being overwhelm.
 
OK, thanks. I must have been thinking about BGD.
 
So if i cant get an ASET image from JA would the IS suffice?

I am still waiting on the IS image for another diamond. After that, i should consult the gemologist about that feather along with an opinion between the two diamonds, right?
 
Yap, IS is sufficient for a round.

Yap, ask for the opinion of the gemologist on the feather and which stone performs better to her/his eyes.
 
Date: 4/13/2010 12:30:42 PM
Author: axiochris
So if i cant get an ASET image from JA would the IS suffice?

I am still waiting on the IS image for another diamond. After that, i should consult the gemologist about that feather along with an opinion between the two diamonds, right?
Click to expand...
Yes an Idealscope image would be fine. And definitely consult one of the gemologists concerning the feather, chances are its fine but best to make sure.
 
awesome, you two are the best.

What exactly should i ask about the feather. Like why is it showing up on the IS image (leaking light) and its structural integrity??
 
You can do that. The feather is not leaking light, probably the orientation of the feather, which is a facet in itself, such that is it reflecting white light into the camera, but no way to really tell. :P

They will advise you accordingly, just ask.
 
Date: 4/13/2010 1:22:45 PM
Author: axiochris
awesome, you two are the best.

What exactly should i ask about the feather. Like why is it showing up on the IS image (leaking light) and its structural integrity??
Click to expand...
Thats very kind of you, thank you!

The feather probably isn''t interfering with light return to any degree appreciable by the human eye, check whether it breaks the surface or could otherwise be an issue, very unlikely but best to check.
 
Alright really need everyones help now. I got the other IS image for the second diamond i am interested in. In summary,

Diamond #1
Carat weight: 1.51
Cut: Ideal
Color: F
Clarity: SI1
Certificate: GIA
Depth: 62.4%
Table: 56.0%
Crown Angle: 35
Pavilion Angle: 40.8
HCA Score: 1.60
Polish: Excellent
Symmetry: Excellent
Girdle: Medium to slightly thick
Culet: None
Fluorescence: None
Measurements: 7.31*7.34*4.57



http://www.jamesallen.com/diamonds/F-SI1-Ideal-Cut-Round-Diamond-1272752.asp

1272752.jpg
 
both look good from the idealscope image.
 
The 1.57 (second diamond)looks less symmetrical.The arrows around 6 oclock looks shorter. Does that even matter in overall light performance or are we just looking for white space/light leakage?
 
ask for the loupe image. the shorter arrow could be just due to the tilt of the stone when the idealscope image is taken, but there is no/very slight leakage there from the idealscope image anyway.
 
both are knock-your-socks-off gorgeous.
 
Argh...the more i look the more i notice. Here is the 1.51 (first diamond). I think the highlighted green circles indicate areas of more light leakage. I do not notice that in the 1.57.

Idealscope 1.51- circles.JPG
 
Those will add contrast to stone, it is controlled leakage. Go look at some of the other branded H&A stones like GOG, WF ACA or CraftedbyInfinity stones.
 
Is that preferable to the second stone which doesent show as much of the "controlled leakage".
I have looked at other H&A stone and i do see white pattern in those areas in some and some have it less. Is there a preference or am i really getting too nitpickey.

With the everyones help, i think im getting close to being comfortable in making a purchase online for a diamond, sight unseen.

Thanks a bunch!
 
I don''t think you''d notice any difference in real life at all. The Ideal Scope shows leakage, but it doesn''t tell you what you will see with your eyes.
 
Date: 4/13/2010 11:16:27 PM
Author: axiochris
Argh...the more i look the more i notice. Here is the 1.51 (first diamond). I think the highlighted green circles indicate areas of more light leakage. I do not notice that in the 1.57.
Click to expand...
These white areas are what is called controlled leakage, these areas are added on purpose as they can aid desirable visual properties of the stone such as increased scintillation and contrast. Those areas are present in the 1.57 but are not as noticeable.
 
Great! thanks

Anyone else care to chime in on a preference between the 2 diamonds??
 
Really, you won''t notice any difference between the two IRL.
 
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