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Table Question


bayouadrnk
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Ive been shopping, trying to educate myself. I have noticed that "table" can make a big difference. I saw a 1ct and a 1.3ct diamond beside each other, and they looked the same "size", as the 1ct had a larger table.

 

If a larger table will give the visual look of a larger diamond (since c is weight), is there too big of a table? I am shopping for a princess cut. If I have two diamonds that are both 1.4ct, but one has a table of 57%, and one has a table of 73%... I assume the 73% diamond will "look bigger" in the setting, but what is the negative side to a bigger table? And is there a preferred % to stay under?

 

Or am I completely wrong in my entire understanding of the table education above?

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In general, the 73% table will have a lower crown height percentage than the diamond with the 57% Table. Crown angle and crown height are important in generating scintillation and contrast brilliance which will make the diamond very noticeable in all types of lighting conditions.

 

Depending on how the rest of the diamond was cut, the 73% Table may face up more opaque and glassy than the stone with the 57% Table.

 

Table % is but one factor in determining the diamonds face up appearance. Pavillion angle, Crown angle and other factors are also very important.

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You aren't completely wrong, but you aren't completely right either.

 

First of all, a table % is a % of something - specifically of the diameter (or average side length) of the diamond. So a different % means relatively little if it is not put into the context of the actual dimensions of the diamond. This brings up the other parameter which matters in terms of visual size - i.e.depth - again expressed as a % of diameter. This is much more significant, in as much as a 1.30 can have the same "face" size as a 1.00 - for example, these two guys

 

http://www.diamondreview.com/clk.cgi?http://www.abazias.com/database/NewDiamondInfo.asp?stock=108544954&flag=dr

http://www.diamondreview.com/clk.cgi?http://www.abazias.com/database/NewDiamondInfo.asp?stock=76263412&flag=dr

 

and yet, the table of the 1.38 is "more" (77%) than the table of the 1.01... however the two diamonds will look largely the same size.

 

Secondly, while it is true that a large table can give a (misleading) impression of size, it is not without other consequences. Imagine a diamond with a 100% table: it's a pyramid with a multi-faceted bottom reflecting back a lot of light, but has little play of light and virtually no fire. It may look "big", but not particularly interesting.

 

Unfortunately, and particularly for princess cuts (and in general for non-rounds) coming up with "rules" such as "not above x%" and "not below y%" is not particularly useful; there are many other parameters that matter, and it's their inter-relationship that makes a diamond well cut (or not).

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