Round diamonds width/height difference

[GFORCE100]

Hi all,

I have a question that I believe hasn't been asked yet.

Why is it that in this day and age one cannot see many ~exact cut round diamonds (i.e. width to height values)?

Some examples

5.55x5.61mm (difference 0.06)
5.56x5.64mm (difference 0.0
6.17x6.23mm (difference 0.06)


Examples could be many but the above prove the point. Why is it that one must look very hard indeed to find a round diamond that is cut to 0.02-0.01mm difference between its width to height?

With so much technology at our fingertips we can get into very fine detail but it seems many diamonds are cut with lesser attention to such performance.

Is it just cutters doing the job quicker thus of less quality to earn more money shifting more diamonds or is it indeed so damn hard to get into the 0.02-0.01mm difference range?


Your thoughts on this would be welcome,

 

[rainbow]

Hello,

I''m a newbie here, but I was under the impression that round diamonds normally have 3 measurements shown like this;

6.41 x 6.47 x 3.96

The first 2 measurements are the longest and shortest measurements across the crown of the diamond, the last figure is the height.

 

[GFORCE100]

Date: 6/19/2005 7:12:11 AM
Author: rainbow
Hello,

I''m a newbie here, but I was under the impression that round diamonds normally have 3 measurements shown like this;

6.41 x 6.47 x 3.96

The first 2 measurements are the longest and shortest measurements across the crown of the diamond, the last figure is the height.

Correct I didn''t mention the depth and called the others width/height when perhaps it would of been better to call it width/length.

Anyhow height if looking at the three measurements would be depth and since the latter can vary without affecting the exactness of the width/length I chose not to mention it.

 

[pricescope]

We checked thousands of stones and found that an average difference between max and min diameter is about 1% for round stones.

 

[Spear]

Date: 6/19/2005 7:21:01 AM
Author: GFORCE100



Correct I didn''t mention the depth and called the others width/height when perhaps it would of been better to call it width/length.

Anyhow height if looking at the three measurements would be depth and since the latter can vary without affecting the exactness of the width/length I chose not to mention it.

Are you talking about length/width or are you talking about diameter/depth?

Diamonds are not cut perfectly round in order to save carat weight.
A cutter can certainly cut a diamond perfectly round but chooses not to do so in order to retain more of the original rough weight.

 

[GFORCE100]

Date: 6/19/2005 7:47:03 AM
Author: Spear

Date: 6/19/2005 7:21:01 AM
Author: GFORCE100




Correct I didn''t mention the depth and called the others width/height when perhaps it would of been better to call it width/length.

Anyhow height if looking at the three measurements would be depth and since the latter can vary without affecting the exactness of the width/length I chose not to mention it.

Are you talking about length/width or are you talking about diameter/depth?

Diamonds are not cut perfectly round in order to save carat weight.
A cutter can certainly cut a diamond perfectly round but chooses not to do so in order to retain more of the original rough weight.

I''m talking about length/width.

Hmmm. What you say seems like a valid point but this now raises the question why are very few round diamonds cut to be more round than others? There''s got to be another variable involved. I''m just checking if it''s got to do more than with the skill of the cutter.

Thanks.

 

[Paul-Antwerp]

Date: 6/19/2005 7:47:03 AM
Author: Spear

Date: 6/19/2005 7:21:01 AM
Author: GFORCE100




Correct I didn''t mention the depth and called the others width/height when perhaps it would of been better to call it width/length.

Anyhow height if looking at the three measurements would be depth and since the latter can vary without affecting the exactness of the width/length I chose not to mention it.

Are you talking about length/width or are you talking about diameter/depth?

Diamonds are not cut perfectly round in order to save carat weight.
A cutter can certainly cut a diamond perfectly round but chooses not to do so in order to retain more of the original rough weight.

Incorrect. The diamond not being perfectly round is due to the directional hardness of the crystal.

We do aim for the stone being perfectly round, because it greatly improves the consistency all-over the stone, if we achieve that.

A bigger deviation can be a sign of the cutter trying to save weight. But in that case, he has already decided for a more commercial cut, and not for something close to ideal.

Live long,

 

[karenleah15]

I in no way claim to know a lot about diamonds but could it be that the one cutting the diamond is human and the item being cut is made by nature? Two things that are not perfect.