shape
carat
color
clarity

How to Read Pavilion-Up ASET

Joined
May 4, 2018
Messages
19
Hello,

I read some articles on how to read crown up view ASET ( ASET shows 8 +8 arrows) and found a metric for crown up ASET map as a function of crown and pavilion angles. I understand that people view the ring on the diamond's crown and different ranges of light spectrums angles from above the diamond's crown that shows different colors in ASET.

However, I'm curious on how to read a pavilion up ASET (ASET shows 8 hearts). Is there any standard like a metric map for a pavilion up ASET? And what does a pavilion up ASET reveal (symmetry and color)?

Here are two diamonds' AGS ASETs from WF below. I also attached these two diamonds' WF links for more information if needed.
https://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3956076.htm
https://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3885280.htm
First.PNG Second.PNG
The first diamond's pavilion up ASET has less red color on its outer circle than that of the second. But the idea how we implement red, green, and blue for crown-up ASET seems does not work on the pavilion up ASET.

Please help :)
 
The colors do not matter in that use case, it is the symmetry that is important.
They are also computer generated based on scanner data which is not 100% accurate compared to a real hearts image.
 
Thank you @gm89uk. Thank you @Karl_K.

As Karl mentions, a diamond's actual ASET might differ from its AGS computer generated ASET. But why this happened? Is there any information computer generated ASET missed?

One diamond I am looking right now even perform better in actual ASET than in AGS ASET i guess. I am nonplused by this difference:(
The first image is its actual ASET and the second is its AGS ASET. I also attached its full AGS report below for your convenience.
The diamond link is https://www.whiteflash.com/loose-diamonds/round-cut-loose-diamond-3885280.htmReal ASET.PNG AGS ASET.PNG
 

Attachments

AGS ASET and RL ASET may have different obstruction angles (usually more in computer generated hence more blue).

Computer generated ASET is virtually backlit, where as this real life ASET is not backlit (look at white contrast points in computer generated).

Both are great. Generally the real life one will be much higher resolution with regards to detail and conversely sometimes errors are exaggerated on computer ASETs. Small scanning errors such as dust particles can mess up the computer generated ASET, but it's definitely better than nothing.
 
GET 3 FREE HCA RESULTS JOIN THE FORUM. ASK FOR HELP
Top