Carat Weight vs. Physical Measurements

[thebachelor12345]

Hi Everyone,

General question just out of personal curiosity. How is it possible that two identical carat weight diamonds could have measurements that deviate larger or smaller across most measurements?

Here's an example:

https://www.bluenile.com/ca/diamond...MONDS&track=viewDiamondDetails&action=sameTab

This is a 1.7ct princess cut with dimensions of 6.5 X 6.4 X 4.59

I recently purchased a 1.7ct princess cut with dimensions of 6.88 X 6.68 X 4.74

Is it the girdle that's making up for that weight difference? I have a medium girdle while the one I've referenced above is thick. If that's the case, I assume you'd want to aim for the thinnest girdle possible without compromising the durability of the edge? When you plug those sizes into www.diamdb.com for comparison you get 10% greater top surface area despite the identical wright.

 

[msop04]

Because of the cut... steep/deep = smaller diameter, 60/60 = larger diameter usually. My 3.33 ct measures like a 3.5-3.6 ct.

 

[msop04]

Hi Everyone,

General question just out of personal curiosity. How is it possible that two identical carat weight diamonds could have measurements that deviate larger or smaller across most measurements?

Here's an example:

https://www.bluenile.com/ca/diamond...MONDS&track=viewDiamondDetails&action=sameTab

This is a 1.7ct princess cut with dimensions of 6.5 X 6.4 X 4.59

I recently purchased a 1.7ct princess cut with dimensions of 6.88 X 6.68 X 4.74

Is it the girdle that's making up for that weight difference? I have a medium girdle while the one I've referenced above is thick. If that's the case, I assume you'd want to aim for the thinnest girdle possible without compromising the durability of the edge? When you plug those sizes into www.diamdb.com for comparison you get 10% greater top surface area despite the identical wright.

The crown is probably flatter. You do not want the thinnest girdle, for durability reasons.

 

[distracts]

"How is it possible that two identical carat weight diamonds could have measurements that deviate larger or smaller across most measurements?"

Well... it's a three-dimensional object. If some angles are different, it changes the overall shape and size. If you go on James Allen where you can see the diamonds rotating, you can get an idea for what shapes produce smaller versus larger diamonds.

 

[Karl_K]

Weight does not equal spread in any cut.
In fancies not only does weight not equal spread but depth does not equal spreed.
It is just the way the industry works.
Diamonds are sold by weight not spread
Some might be tempted to shoot for the most spread for the dollar, but that can sometimes be a mistake as the stone might have poor light performance.
Other times it can pay off with a larger well cut stone, it depends on how well cut the diamonds are in the comparison.