Table % and Depth % Question

[KrWz]

Hi Guys and Gals. I''ve been reading around about Table % and Depth % but most of the topics relate to round dimaonds. For a princess cut diamond, would a depth % of a little over 75% and a table % of a little over 80% be undesirable? The ratio of the diamond is I believe 1.01. Hopefully this is enough information. Thanks.

 

[Rank Amateur]

Quite likely very not so good.

Keep in mind that there are many many fish in the princess sea.

 

[researcher]

It''s actually not enough information. There have been some new threads here related to the depth of princesses which have really confused me, but, despite that thread, I don''t think you want a stone with a depth greater than 75%. Also, I table of 80% is really not desireable as it will probably lead to a lot of light leakage and little fire. I would personally look for a stone with a depth of 75% or less, and a table that is no more than equal the depth (unless the crown is 10% or greater). Hope this helps!

 

[KrWz]

Researcher, you mentioned to "look for a stone with a depth of 75% or less, and a table that is no more than equal the depth (unless the crown is 10% or greater)." For a princess cut, how would you know what the dimensions of the crown are? On the GIA cert I don''t believe it mentioned anything about a crown %? Isnt the crown just related to round diamonds?

I should of done more research on diamonds before making any purchases.

I guess I figured that since I was getting the diamond from my gfs preferred jeweler (BBB) that they wouldent try to rip me off. Ah i''m hoping that theres a chance that the diamond is still ok and doesnt look too bad. When looking at it in the store it looked good to me but i''m far from being a diamond expert. *sigh

 

[KrWz]

I just found this article:

http://www.diamondhelpers.com/ask/0015-princessguidelines.shtml

which gives me some hope. I''m seriously debating on whether or not I should go back to BBB and see if I could upgrade the diamond. I just hope its in time because they were going to ship the loose diamond out to Scott Kay to have it placed in a ring. I need to check to if I can even ''change my mind'' without any sort of penalty. Does anyone know if theres a penalty?

 

[KrWz]

I just found this too but who knows how accurate it is.

http://www.diamonddoctor.com/diamond-value.html#diamondvalue

 

[researcher]

The cert won''t have information for you regarding the crown and pavilion, but these are numbers you really need to help judge the cut of the stone. Also, I personally would never buy a stone without an ideal scope image (they show you whether the stone leaks light). What I''ve learned about princess cut stones is there are always exceptions to the rule, but the best stones tend to have smaller tables.

If I were you I would look into getting a different stone. It may be your gf''s preferred jeweler, but that doesn''t mean she''s/they''re extremely knowledgeable about diamonds (I was using a local jeweler until I found WF through PS, and with the deals and amazing craftmanship I get now there''s no way I''d buy from the old company (even though the owner is a friend''s mom)). The likelihood that this stone is premium is not very good....

 

[Paul-Antwerp]

Date: 4/28/2005 5:38

2 PM
Author:KrWz
Hi Guys and Gals. I''ve been reading around about Table % and Depth % but most of the topics relate to round dimaonds. For a princess cut diamond, would a depth % of a little over 75% and a table % of a little over 80% be undesirable? The ratio of the diamond is I believe 1.01. Hopefully this is enough information. Thanks.

I am sorry to say that this is definitely insufficient information.

With a table of 80%, the probability of your stone having high light performance is minimal. In the new AGS-system, there are only few possible angle-combinations, leading to AGS-0, while there are much more possibilities with smaller table sizes.

Traditionally, a depth of over 75% is regarded as undesirable, but this ''rule'' is based upon observations of the traditionally cut princesses, which are cut primarily for weight retention. Since your stone is probably cut for weight retention too, like 99% of currently available princess-cuts, the probability is high that your stone does not have a very good light performance.

On the other hand, while cutting princesses according to AGS-0-standards, I have learned that a lot of these AGS-0''s have total depths around 77-78%. Since AGS has us thinking outside of the box, the old rules based upon past observations do not really apply anymore. However, with this AGS-system being rather new, chances are low that you are looking at a stone, cut to these new specs.

Live long,

 

[KrWz]

I took a look at the Diamond again yesterday and it appeared to have very nice sparkle and looked beautiful. It could of been the lighting in the store or perhaps it was just my uneducated eye. I will accept that the stone cut is not an ''ideal'' cut (based on numbers) but rather a ''good'' cut as long as it can still be appreciated by my future fiance''s eye. I had informed my jeweler that I was ready to spend more and purchase an upgrade of the diamond and he said I could do that but assured me that I should not be worried about the beauty of the current diamond. He informed me that there was no determined range of ''numbers'' for fancy style diamonds such as the princess (round modified brilliant) and that the only consensus with the ''numbers'' is with the Round cut. If the diamond were not a good cut then it would not look as beautiful as it did. He also mentioned that the diamond had a GIA cert which gave the diamond good ratings and something about how the GIA would not even rate poor diamonds or how they would put comments on the cert stating the poor quality. Not sure how accurate his statement is about the GIA but ah well.

 

[oldminer]

In a rather short period of time we will all have many more highly brilliant choices in princess cuts. I have seen some of these high performance diamonds and they are quite striking. Ordinary cut princess cuts will either be less costly or good re-cut candidates. It will be less important how deep a stone is when we measure performance, but the deeper the stone, the smaller it looks at a given weight. If a stone has a very thin girdle or a very shallow crown, it is more likely to break.... These facts will never change, so parameters will still have some screening merit. Light Behavior will be a VERY important factor in choosing a diamond, but it will NOT be the only factor. Diamond grading and selection is undergoing a huge change, but not all the rules are being altered. Some truths will remain unchanged, just like the laws of physics and optics. However, the more we know, the better we can make our choices.

 

[valeria101]

Date: 4/29/2005 11:12:33 AM
Author: KrWz

he said I could do that but assured me that I should not be worried about the beauty of the current diamond

Unless he gives you options (= several diamonds including some with known top brilliance) to choose from... well, any diamond is rather nice by itself and lookig at just one does not ammount to a very informed decission. Not having much choice appears to be common though, for what "common" is worth.

How about the price ?

 

[KrWz]

As the price goes, comparing the specs and numbers to those similar that I have found online it looks like I paid a little more than what I could have gotten from say Bluenile.com so yea I know I dident get the best ''deal'' or bang for the buck as one would say. I had anticipated that the price would be higher but I added the convenience factor into the price...although its indeed a hefty price to pay for convenience...doh!

The jeweler did have 3 other similar type diamonds that I was looking at, but I could only compare at most two at the same time because I figured it was for security reasons. From what I recall, the diamond we''re talking about had more of that shine and twinkle look to it then the other diamonds I was considering so at least theres that.

Well thanks for the info and feedback guys! Much appreciated!