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What Is The Best % For Table & Depth


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#1 Roger DR

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Posted 24 May 2009 - 09:49 PM

Could you please advise me on what is the best % for the table & depth for a 0.7-1.0 ct diamond?

#2 davidelevi

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Posted 25 May 2009 - 01:00 PM

No such thing, I am afraid. Even for a round brilliant, at best you can specify a range, and that will be purely indicative. Take a read through some of the recent threads for more on the topic; bear in mind that % are relative to the overall size of the diamond, so it won't make a difference (proportion-wise) whether you are talking of a 0.7 or of a 5ct stone.

For example, see here for a recent thread on the subject.
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#3 Roger DR

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Posted 26 May 2009 - 05:09 PM

No such thing, I am afraid. Even for a round brilliant, at best you can specify a range, and that will be purely indicative. Take a read through some of the recent threads for more on the topic; bear in mind that % are relative to the overall size of the diamond, so it won't make a difference (proportion-wise) whether you are talking of a 0.7 or of a 5ct stone.

For example, see [url="http://www.diamond.info/forum/index.php?showtopic=4751"]here[/url] for a recent thread on the subject.


David,

Thank you very much for your advice.

#4 barry

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Posted 27 May 2009 - 03:09 AM

Roger;

The general range for table and depth percentages are:

Table= 54-61%

Depth= 59-62.4%

There is a lot more to factor than just these two variables, e.g.;

1. crown angle and crown height,

2. Pavilion angle,

3. angle and size of the upper and lower girdle facets.

I don't want to get too technical nor haze you with techno-geekery "numbers" but just to indicate that the 58 facets of the round brilliant shape diamond act in concert and affect face up light performance and beauty. Therefore, two round diamonds with the same Table and Depth percentage may very well face up differently. Which diamond you prefer will depend on your taste and reaction.

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Edited by barry, 27 May 2009 - 06:37 AM.

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#5 RCexpert

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Posted 10 June 2009 - 02:25 PM

Hi,
I have seen this term "Face up" a coupe times reading in this forum. Can you tell me what this references exactly?
Thank you.

#6 barry

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Posted 10 June 2009 - 02:43 PM

The top of the diamond ( Table facet and crown facets) facing you.

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#7 davidelevi

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Posted 10 June 2009 - 10:13 PM

Also when used as a verb ("this diamond faces up big for its weight"), meaning the visual size of the diamond when looking at it with its 'face up'
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#8 RCexpert

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Posted 11 June 2009 - 09:40 AM

Thank you. That puts some clarity (no Pun intended) on the other topics I was reading with the term.