please help give me some comment for this diamond!

[flystar168]

Hi Everyone.

I am looking for one diamond with 0.8c to 0.9c, I found one as be below. how about the cut, Fire and others? Please give me some comments. Thank you in advance and look forward to your reply.

 

[E B]

It's beautiful. As long as it's eye-clean, go for it!

 

[flystar168]

Thanks E B!!!!

 

[Gypsy]

Ditto EB.

 

[flystar168]

Thank you !!

 

[flystar168]

How about the light performance according as the IS pic, Does anyone give me some comment? how to judge the light performance from IS pic? thank you !!

 

[flyingpig]

How about the light performance according as the IS pic, Does anyone give me some comment? how to judge the light performance from IS pic? thank you !!

Well.. Whatever the IS/ASET you see on the diamond page is as good as it gets. That's why it is ACA. Notice solid red throughout under the table. No whiteness (light leakage) except around the edge.

http://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3461753.htm
notice a few patches of white under the table
http://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3625397.htm
This one is even worse.

Reference Chart
http://ideal-scope.com/reference-chart-ideal-scope-images/

 

[flystar168]

How about the light performance according as the IS pic, Does anyone give me some comment? how to judge the light performance from IS pic? thank you !!

Well.. Whatever the IS/ASET you see on the diamond page is as good as it gets. That's why it is ACA. Notice solid red throughout under the table. No whiteness (light leakage) except around the edge.

http://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3461753.htm
notice a few patches of white under the table
http://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3625397.htm
This one is even worse.

Reference Chart
http://ideal-scope.com/reference-chart-ideal-scope-images/

Many thanks to flyingpig. Sorry, I am newbie.

Does the light performance affect "brilliant" or "fiery"?

for the first stone, I found one whiteness on the table as below with blue color mark on the IS pic



for the second stone, I found a big whiteness block on the table as below with blue color mark on the IS pic





So the first stone is better than second stone. right ?

 

[flyingpig]

"Does the light performance affect "brilliant" or "fiery"?"

The Ideal-Scope gives us indications of a diamonds brilliance; i.e. its light return and leakage as well as its contrast (which has a lot to do with scintillation. (directly from idealscope website. http://ideal-scope.com/about-ideal-scope/)
Diamonds with high-dispersion have the greatest potential to exhibit fire (from AGS Document). All ACAs are AGS ideal in light performance. AGS light performance grade includes dispersion (along with brightness, leakage, and contrast). Stones with no significant deduction in these four sub category are awarded Ideal in AGS light performance.

Therefore, yes, the light performance affects (or is affected/measured by) both brilliance and fire. And the ACA stone you picked should have great brilliance and fire. It is just the best of the best

"So the first stone is better than second stone. right ?"
Yes, based on the IS images alone.

 

[flystar168]

"Does the light performance affect "brilliant" or "fiery"?"

The Ideal-Scope gives us indications of a diamonds brilliance; i.e. its light return and leakage as well as its contrast (which has a lot to do with scintillation. (directly from idealscope website. http://ideal-scope.com/about-ideal-scope/)
Diamonds with high-dispersion have the greatest potential to exhibit fire (from AGS Document). All ACAs are AGS ideal in light performance. AGS light performance grade includes dispersion (along with brightness, leakage, and contrast). Stones with no significant deduction in these four sub category are awarded Ideal in AGS light performance.

Therefore, yes, the light performance affects (or is affected/measured by) both brilliance and fire. And the ACA stone you picked should have great brilliance and fire. It is just the best of the best

"So the first stone is better than second stone. right ?"
Yes, based on the IS images alone.

OH, good job, thank you very much for you comment.

 

[flystar168]

"Does the light performance affect "brilliant" or "fiery"?"

The Ideal-Scope gives us indications of a diamonds brilliance; i.e. its light return and leakage as well as its contrast (which has a lot to do with scintillation. (directly from idealscope website. http://ideal-scope.com/about-ideal-scope/)
Diamonds with high-dispersion have the greatest potential to exhibit fire (from AGS Document). All ACAs are AGS ideal in light performance. AGS light performance grade includes dispersion (along with brightness, leakage, and contrast). Stones with no significant deduction in these four sub category are awarded Ideal in AGS light performance.

Therefore, yes, the light performance affects (or is affected/measured by) both brilliance and fire. And the ACA stone you picked should have great brilliance and fire. It is just the best of the best

"So the first stone is better than second stone. right ?"
Yes, based on the IS images alone.

but I notice that Crown Angle is 34.9 and Pavilion Angle is 40.7. Is the crow angle is more than 34.5. So should I need to be worry about this ?

 

[flyingpig]

http://www.whiteflash.com/a-cut-above-diamonds-specifications-and-qualifications/

The ideal range for crown angle is 34-35. 34.9 is perfectly fine and ASET/IS confirms this.
You have NOTHING to worry about in regards to light performance and proportion numbers, when buying an ACA stone.

Just ensure the stone you want is eye-clean

 

[flystar168]

http://www.whiteflash.com/a-cut-above-diamonds-specifications-and-qualifications/

The ideal range for crown angle is 34-35. 34.9 is perfectly fine and ASET/IS confirms this.
You have NOTHING to worry about in regards to light performance and proportion numbers, when buying an ACA stone.

Just ensure the stone you want is eye-clean

Thank you very much for your great help

 

[Dancing Fire]

A very nice stone!...