Which one would you want?

[akim1220]

Hi, this is a repost from on of my other posts. I made that entry so confusing to everyone I figured I'd better just make a new post.

I am coming down to the wire on making a final decision between 2 stones (by end of today). They both got an excellent on the HCA advisor so I would like to know which one would you buy between the 2. Only idealscope images will be posted to compare the two but the 1st one has the ASET image as well if you would liek to take a look. The WF stone is a little over $1k more than the JA. Thanks so much again.

1st Stone (http://www.whiteflash.com/round_ideal_cut/Round-Ideal-Cut-cut-diamond-2169560.htm):
HCA - 0.5
Shape: Round Ideal Cut
. Carat: 1.756
. Depth %: 61.4
. Table %: 55.5
. Crown Angle: 34.6
. Crown %: 15.4
. Star : 53
. Pavilion Angle: 40.5
. Pavilion %: 42.6
. Lower Girdle %: 76
. Girdle: Thin to Medium Faceted
. Measurements: 7.74-7.77X4.77
. Light Performance: 0
. Polish: Ideal
. Symmetry: Ideal
. Culet: Pointed
. Fluorescence: Negligible

 

[akim1220]

2nd Stone (http://www.jamesallen.com/diamonds/G-SI1-Ideal-Cut-Round-Diamond-1248962.asp):
HCA - 0.6
ROUND BRILLIANT
Measurements: 7.76 - 7.82 x 4.74 mm
Carat Weight: 1.74 carat
Color Grade: G
Clarity Grade: SI1
Cut Grade: Excellent
PROPORTIONS:
Depth: 60.8%
Table: 56%
Crown Angle: 34.0°
Crown Height: 15.0%
Pavilion Angle: 40.6°
Pavilion Depth: 42.5%
Star length: 55%
Lower Half: 80%
Girdle: Thin to Medium, Faceted (3.5%)
Culet: None
FINISH:
Polish: Very Good
Symmetry: Very Good
Fluorescence: None

 

[stone-cold11]

Both look good to me.

 

[FB.]

Both have excelelnt proportions "on paper", but in view of their slightly shallow pavilion angles (40.8 is ideal), I suggest that you read the current "obstruction" thread.

 

[stone-cold11]

FB, IS will reveal if there is obstruction issue and it is not present in both of these stone.

 

[FB.]

Stone, do you have an IS available for an obstructed stone?

Thanks,

 

[stone-cold11]

If you think about what the black region is for the IS?

Meaning, if there is obstruction issue with the stone, the black will be more obvious and not limited to the arrow shafts.

From this thread. https://www.pricescope.com/community/threads/please-help-t-minus-20-days.124298/page-2

 

[Lorelei]

Both are excellent images.

FB as with the IS image above, obstruction can show as a darkness in the image or the arrowheads resemble paddles, the image SC posted shows this in an image with visible obstruction. Also you can see increased darkness in the arrow shafts.

 

[akim1220]

So there are no obstructions in the IS images of the 2 diamonds?

 

[FB.]

I bow to Stone's and Lorelei's superior knowlegde.

If they consider it to be fine, it should be.

 

[Lorelei]

Date: 11/25/2009 1:31:20 PM
Author: akim1220
So there are no obstructions in the IS images of the 2 diamonds?

None that I can see.

 

[D&T]

If you are concern with future upgrades, then I would select the WF stone, If budget is tight, then select the JA stone....

 

[Lorelei]

Date: 11/25/2009 4:01:25 PM
Author: FB.
I bow to Stone''s and Lorelei''s superior knowlegde.

If they consider it to be fine, it should be.

 

[Lorelei]

Date: 11/25/2009 4:08:11 PM
Author: D&T
If you are concern with future upgrades, then I would select the WF stone, If budget is tight, then select the JA stone....

Good pointeroonie!

 

[Laila619]

How is it possible that a diamond with a 40.5 pavilion won't show obstruction? With the JA diamond, the arrow heads at 1 and 2 o'clock show possible slight paddles and darkening at the shafts. Nothing major, but I'd prefer the WF.

 

[FB.]

Date: 11/25/2009 4:32:21 PM
Author: Laila619
How is it possible that a diamond with a 40.5 pavilion won''t show obstruction? With the JA diamond, the arrow heads at 1 and 2 o''clock show possible slight paddles and darkening at the shafts. Nothing major, but I''d prefer the WF.

It''s not so much as case of it will or it won''t, but more a case of how much is visible and how far away you need to be, before obstruction is no longer visible.

 

[Lorelei]

Date: 11/25/2009 4:32:21 PM
Author: Laila619
How is it possible that a diamond with a 40.5 pavilion won't show obstruction? With the JA diamond, the arrow heads at 1 and 2 o'clock show possible slight paddles and darkening at the shafts. Nothing major, but I'd prefer the WF.

It depends on the tightness of the pavilion angle and rounding issues, length of lower girdle facets and the photography set up. If for example the pavilion angle is swinging out to be more shallow than 40.5 as in the WF stone and the diamond isn't tightly cut as a result, it is completely possible the diamond could show obstruction but the images prove this isn't the case. With the JA stone it could be tilted slightly.