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toehead93

Rough_Rock
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Jan 27, 2009
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This is like a total crap shoot for me. I''ve read about depth:table ratios, percentages, etc and found these 3. What are your thoughts? Also, I have seen a lot of good feedback for JamesAllen, what about the other two jewelers below?

http://www.jamesallen.com/diamonds/G-VS1-Ideal-Cut-Princess-Diamond-1261855.asp?b=16&a=12&c=77&cid=131

http://www.exceldiamonds.com/Loose_Princess_Cut_Diamond-144/Loose_Princess_Cut_0.92_Carat_G_Color_VS1_Clarity_diamond-256075.html

http://www.abazias.com/database/NewDiamondInfo.asp?stock=72980620&src=builder
 
Date: 11/11/2009 10:38:58 PM
Author:toehead93
This is like a total crap shoot for me. I've read about depth:table ratios, percentages, etc and found these 3. What are your thoughts? Also, I have seen a lot of good feedback for JamesAllen, what about the other two jewelers below?

http://www.jamesallen.com/diamonds/G-VS1-Ideal-Cut-Princess-Diamond-1261855.asp?b=16&a=12&c=77&cid=131

http://www.exceldiamonds.com/Loose_Princess_Cut_Diamond-144/Loose_Princess_Cut_0.92_Carat_G_Color_VS1_Clarity_diamond-256075.html

http://www.abazias.com/database/NewDiamondInfo.asp?stock=72980620&src=builder
Click to expand...
Hi toehead

You would need to request an ASET image for the JA diamond and also ask Excel for the images for their Princess. With Abazias I don't think they offer images needed, their diamond is also EGL Israel graded so you might want to stick to GIA or AGS.
 
Date: 11/11/2009 10:38:58 PM
Author:toehead93
I''ve read about depth:table ratios, percentages, etc
Click to expand...

Unfortunately the well known and time tested methods for selecting a round brilliant ideal cut diamond "by the numbers" does not work for fancy shape diamonds in my experience. In fact, attempting to purchase a fancy shape diamond by the numbers is an easy way to be misled from both a technical and psychological perspective.

A round brilliant is a symmetrical stone with one main pavilion angle and one main crown angle. As such the total depth measurement of a round brilliant cut diamond is a direct result of the pavilion angle and the crown angle in combination with the table size and the thickness of the girdle edge. Because the design and structure of a round brilliant cut diamond is so straightforward, the rule that depth relates to spread can be applied accurately.

Where a round brilliant cut diamond has one main pavilion angle, a princess cut diamond has two main pavilion angles... And a princess cut diamond has two main crown angles... In addition, the table diameter of a princess cut diamond can vary considerably, e.g. from as little as 55% and in excess of 80% in some cases.

The only way to select a princess cut diamond is by focusing on Cut Precision and Cut Performance, not Proportions! Focus on the ASET, Ideal Scope and H&A scope images and the Light Performance rating provided on AGS Performance Grade lab reports...
 
Pretty, but a bit leaky. I''d keep looking to find one that''s cut to higher standards.
 
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