How do you know which stone has more brilliance?

[p_a]

I am confuse about a few things. I believe I read somewhere here that some diamonds can be a H&A diamond but does not have the best brilliance. I think the same goes for a stone that is graded AGS0 and may also not be a H&A cut. So my question is, how do you determine the best diamond? How do you know that it will give the best light performance? I know that white flash and good old gold provides ideal scope images but how do you really compare. I have two diamonds in mind and I believe one is an AGSO and the other is a H&A cut. They are relatively close in price but I do not know how to decide which one will have the best light performance. What should I be looking at?

 

[chrono]

In that case, ask for an Ideascope and ASET picture. One checks for light leakage and the other for light performance. When you have both for the WF and GOG, post them here for comments and the regulars will tell you why one is better than the other (or it may just be splitting hairs and be a personal taste thing).

 

[Lorelei]

Date: 1/22/2008 12:48:14 PM
Author:p_a
I am confuse about a few things. I believe I read somewhere here that some diamonds can be a H&A diamond but does not have the best brilliance. I think the same goes for a stone that is graded AGS0 and may also not be a H&A cut. So my question is, how do you determine the best diamond? How do you know that it will give the best light performance? I know that white flash and good old gold provides ideal scope images but how do you really compare. I have two diamonds in mind and I believe one is an AGSO and the other is a H&A cut. They are relatively close in price but I do not know how to decide which one will have the best light performance. What should I be looking at?

Yes get the numbers so we can see, also Idealscope images are useful, but with diamonds of this calibre they should both be top performers, but might just have different personalities.

 

[p_a]

Chrono,

Here is the specs for one of the diamond:

. Carat: 1.215
. Depth %: 61.5
. Table %: 55.6
. Crown Angle: 34.8
. Crown %: 15.5
. Star : 51
. Pavilion Angle: 40.7
. Pavilion %: 43
. Lower Girdle %: 75
. Girdle: Thin to Medium Faceted
. Measurements: 6.84-6.88X4.22
. Light Performance: 0
. Polish: Ideal
. Symmetry: Ideal
. Culet: Pointed
. Fluorescence: Negligible

Aset and Ideal images:

 

[p_a]

aset:

 

[Lorelei]

Just chiming in here, an ACA is one of the best cut diamonds in the world, you can't go wrong with one of those. The diamond above has superb numbers and light performance.

 

[p_a]

Second choice diamond specs:
Shape: Round
Carat Weight: 1.21ct
Color: I
Clarity: VS2
AGS Cut Grade: Ideal
est GIA Cut Grade: Excellent
AGS Light Performance: Ideal
Optical Symmetry: Superior
Polish: Ideal
Symmetry: Ideal
Fluorescence: None
Girdle: 1.57%
Culet: None
Lab Report: AGS
Width: 6.86mm
Length: 6.89mm
Depth: 4.23mm
Table Percentage: 56.11%
Depth Percentage: 61.46%
Crown Ú: 34.33‹
Crown Depth: 14.95%
Pavilion Ú: 40.95‹
Pavilion Depth: 43.28%
Upper Girdle Ú: 42.23‹
Lower Girdle Ú: 42.11‹

Idealscope image:

 

[p_a]

Diamxray:

 

[wen104]

You cannot go wrong with either of those diamonds. I didn''t see the color or clarity rating for the first one. Pretty much you need to decided which one has everything you want. If they are the same color and clarity and you confirmed there are no visible inclusions choose by price. Good luck and they are both good choices.

 

[p_a]

Does the two diamond look okay? If I pick either one, it will be a good choice?

 

[Lorelei]

Date: 1/22/2008 2:19:56 PM
Author: p_a
Does the two diamond look okay? If I pick either one, it will be a good choice?

What you have there are 2 of the best cut diamonds available, you could pick either and not go wrong!