are these ASETs accurate?

[cl21]

Were these images taken properly?





This one is actually the same stone of the first one

 

[John P]

There are clear differences in setup. The first two above are in a non-backlit environment. The bottom is backlit. The primary difference is black-leakage in the top photo, white-leakage in the bottom (note that a backlit setup is typically harsher). The most significant difference is girdle-plane alignment. The ASET cone needs to be oriented at zero-degrees with the diamond's girdle. If the diamond's girdle is above or below it changes the relative angular spectrum. That's why there is more obstruction (blue) in the bottom image than the top.

 

[cl21]

There are clear differences in setup. The first two above are in a non-backlit environment. The bottom is backlit. The primary difference is black-leakage in the top photo, white-leakage in the bottom (note that a backlit setup is typically harsher). The most significant difference is girdle-plane alignment. The ASET cone needs to be oriented at zero-degrees with the diamond's girdle. If the diamond's girdle is above or below it changes the relative angular spectrum. That's why there is more obstruction (blue) in the bottom image than the top.

the last image was taken when the stone was placed under backlight, but the holes was for Rounds rather than emerald cut.
So which one should I follow? Does the first (third) one have excellent light performance?
I know the symmetry and polish are terrible, only Good on the GIA

 

[Karl_K]

The first diamond has p3 issues, the long virtual facets in the center, one right on the edge(green in one ASET, white in the other ASET) and the other totally gone(black in one ASET and white in the other ASET).
https://www.pricescope.com/journal/performance-and-p3-facets-discussion-about-step-cut-diamonds

 

[cl21]

The first diamond has p3 issues, the long virtual facets in the center, one right on the edge(green in one ASET, white in the other ASET) and the other totally gone(black in one ASET and white in the other ASET).
https://www.pricescope.com/journal/performance-and-p3-facets-discussion-about-step-cut-diamonds

the first image seems to have more spectrum of colors in pink and purple...compared with regular ASET which only has green blue and red....purple is a mix of blue and red...its just hard for me to tell if the light performance of the first one is ok or not...I like variation of red green and blue with red being major