Steep Deep?

[hlpkaixin3344]

I have been reading much about the steep/deep combos and have a question about these angles:

Selected: 61.9% depth, 55% table, 35.1° crown angle, 40.8° pavilion angle
-GIA Excellent

From what I read the pavilion angle is okay but what about the crown? I remember seeing a post where Loreli (sp?)

mentioned borderline stones that may turn out to be great. The HCA score was a 1.8 and a very reputable appraiser had numerous good comments on the cut quality. I find all the technical aspects of this very interesting.

 

[yssie]

ETA: Oops! I read that wrong!



Numbers are very nice, and you likely have a very beautiful diamond!!


You can always buy your own IS and take a look to confirm

 

[jet2ks]

A 35 degree crown is a great pairing for a 40.8 pavillion. For me, borderline is 35/41 or with a 40.8 pavillion 35.5 or over.

BTW, if it has a GIA report, where are you getting the 35.1, since GIA rounds to the nearest .5 on crown angles?

 

[étoile]

Date: 12/23/2009 5:30:16 PM
Author: jet2ks
A 35 degree crown is a great pairing for a 40.8 pavillion. For me, borderline is 35/41 or with a 40.8 pavillion 35.5 or over.

BTW, if it has a GIA report, where are you getting the 35.1, since GIA rounds to the nearest .5 on crown angles?

Opps, on the GIA it''s 35.5 which canges the HCA, but then if you do it in % it''s back up there again which just totally confused me. So, these numbers are okay plus the good appraisal? It''s a BN diamond and the measurements on the BN cert. have a crown angle of 35.1. I wonder if that is the true measurement since GIA rounds. I guess I don''t really have any way of knowing.

 

[étoile]

Date: 12/23/2009 5:10:54 PM
Author: yssie
ETA: Oops! I read that wrong!



Numbers are very nice, and you likely have a very beautiful diamond!!


You can always buy your own IS and take a look to confirm

After all the reading I''ve done on here, I think that will I will definately be buying one for future purchases. Thank you.

 

[Garry H (Cut Nut)]

I f the symmetry is tight then I have no problem with a stone with these proportions

 

[étoile]

Symmetry, cut, polish are all rated excellent. I just started plugging in the numbers and it made me curious after seeing all of the older posts relating to steep/deep stones. I was mostly sure mine wasn''t in that category but thought it was close. So, I just really wanted to understand it. The wealth of information on here is really great for consumers. I had prob. had too much fun researching.

 

[Dreamer_D]

I think you always need to consider the crown and pavilion angles in concert, that is why you can''t really pick stones based on ranges for either. The HCA is a great tool bc it helps yo uto know if the angle combos work.

 

[Lorelei]

Date: 12/23/2009 4:48:39 PM
Author:étoile
I have been reading much about the steep/deep combos and have a question about these angles:

Selected: 61.9% depth, 55% table, 35.1° crown angle, 40.8° pavilion angle
-GIA Excellent

From what I read the pavilion angle is okay but what about the crown? I remember seeing a post where Loreli (sp?)

mentioned borderline stones that may turn out to be great. The HCA score was a 1.8 and a very reputable appraiser had numerous good comments on the cut quality. I find all the technical aspects of this very interesting.

Hi Etoile,

For me those proportions are borderline steep deep, however there is a very good chance that such stones can be fine depending on the tightness of the angles, and the lower girdle facets can help in some cases. I always want an image with these to make sure but often they make cracking diamonds.

 

[Rockdiamond]

Date: 12/23/2009 4:48:39 PM
Author:étoile
I have been reading much about the steep/deep combos and have a question about these angles:


Selected: 61.9% depth, 55% table, 35.1° crown angle, 40.8° pavilion angle

-GIA Excellent


From what I read the pavilion angle is okay but what about the crown? I remember seeing a post where Loreli (sp?)

mentioned borderline stones that may turn out to be great. The HCA score was a 1.8 and a very reputable appraiser had numerous good comments on the cut quality. I find all the technical aspects of this very interesting.

It''s also true that some stones categorized as "Steep Deep" are also great looking performers in person.
The term and theory behinds what is known here as "Steep Deep" is by no means accepted by the trade at large.

 

[Garry H (Cut Nut)]

Date: 12/24/2009 2:10:31 PM
Author: Rockdiamond

Date: 12/23/2009 4:48:39 PM
Author:étoile
I have been reading much about the steep/deep combos and have a question about these angles:


Selected: 61.9% depth, 55% table, 35.1° crown angle, 40.8° pavilion angle

-GIA Excellent


From what I read the pavilion angle is okay but what about the crown? I remember seeing a post where Loreli (sp?)

mentioned borderline stones that may turn out to be great. The HCA score was a 1.8 and a very reputable appraiser had numerous good comments on the cut quality. I find all the technical aspects of this very interesting.

It''s also true that some stones categorized as ''Steep Deep'' are also great looking performers in person.
The term and theory behinds what is known here as ''Steep Deep'' is by no means accepted by the trade at large.

I am very sad that you would write such a thing David now that it is clear and evident to regulars that you backlight diamonds when viewing them, and have very little understanding of diamond optics.

What motivates the ''trade at large'' is clearly not what motivates their clients. And the theories the trade accepts is motivated by you know what.

I also noticed that you have offered to breach another companies copyright and post their information which is the base of a charged service.

 

[outatouch0]

Yea and this is a CONSUMER site not a "trade" site. That the majority of the "trade" doesn''t use things like IS images is irrelvant. Astute consumers are learning more and more about the tricks of the trade and countering them in order to select the very best diamonds for their money.

 

[Rockdiamond]

Personally I have a lot of respect for the administrators of this site.
Clearly they allow tradespeopleto post which , IMO, allows a far wider perspective which in turn, benfits consumers.

I also have a lot of respect for the readers who can easily see that personal attacks are launched simply due to a difference of opinion.


I did use the term "trade at large" incorrectly though.
I should have said that many well respected cutters who focus on fine make-and succeed- do not agree with some of the priciples behind the logic used to declare stones "Steep Deep" here.

I agree that the "trade at large" is generally not all that educated to specifics on diamonds

 

[Dancing Fire]

Date: 12/25/2009 11:03:10 AM
Author: Rockdiamond
Personally I have a lot of respect for the administrators of this site.
Clearly they allow tradespeopleto post which , IMO, allows a far wider perspective which in turn, benfits consumers.

I also have a lot of respect for the readers who can easily see that personal attacks are launched simply due to a difference of opinion.


I did use the term ''trade at large'' incorrectly though.
I should have said that many well respected cutters who focus on fine make-and succeed- do not agree with some of the priciples behind the logic used to declare stones ''Steep Deep'' here.

I agree that the ''trade at large'' is generally not all that educated to specifics on diamonds

maybe,b/c they can make a higher profit from a steep/deep stone?