Help analyzing ASET scope heart side

[bonzai008]

I am trying to understand how to interpret an ASET scope on the hearts side and see if there's anything to be concerned about.

Looking at the AGS provided scope below, the two arrow scope looks great as they are both super ideal cut diamonds, but the included hearts scope is different as Hearts2 shows much more shade of greens. There isn't a lot of materials out there that talks has ideal asets for hearts and how important the scope on that side is, any suggestions would be welcomed.

Hearts1


Hearts2

 

[valeria101]

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I wold only be interested to see correctly formed hearts & no more ...

 

[bmfang]

For me ASET pavilion side up (ie hearts) is of more limited utility than the view crown side up. The use of ASET on hearts for me is solely to check for optical symmetry and how well the hearts have been cut.

 

[gm89uk]

Unless you're interested in how the stone reflects light from the bottom then it's of no value to light performance, only optical symmetry. Lovely stones, which vendor are you using if you don't mind me asking?

 

[John P]

As others have stated, the ASET (Angular Spectrum Evaluation) is for assessment of overall light return coming through the crown of a diamond. That pavilion view ASET image, aka hearts, has no real meaning: The AGS Laboratories added that option to satisfy demand from Far East clients who promote "H&A" diamonds.

I'd add that 3D scanners have some given linear/angular error, so these computer generated imprints are not 100% faithful to the diamond. The results are useful for placing the diamond into a broad performance grade, but not for making minute judgments regarding optical precision.

 

[Texas Leaguer]

For me ASET pavilion side up (ie hearts) is of more limited utility than the view crown side up. The use of ASET on hearts for me is solely to check for optical symmetry and how well the hearts have been cut.

Agree completely.
The sole purpose of the pavilion view is to illustrate optical precision.
With the dual light maps on the report a consumer can visually understand important things about the diamond in terms of both light return AND cut precision. In that sense it is very much a value added dimension to the report.
From time to time we find customers are confused by the pavilion side ASET and wonder why there is so much "leakage"!
We actually have addressed this with the AGS Lab and suggested that they add verbiage to the report that clarifies the purpose of the pavilion view for the consumer.

Spoiler alert: You may be seeing that in the near future

 

[Texas Leaguer]

As others have stated, the ASET (Angular Spectrum Evaluation) is for assessment of overall light return coming through the crown of a diamond. That pavilion view ASET image, aka hearts, has no real meaning: The AGS Laboratories added that option to satisfy demand from Far East clients who promote "H&A" diamonds.

I'd add that 3D scanners have some given linear/angular error, so these computer generated imprints are not 100% faithful to the diamond. The results are useful for placing the diamond into a broad performance grade, but not for making minute judgments regarding optical precision.

I'm going to diverge from that view somewhat John, in terms of the general value of the pavilion view ASET. While there is slight instrumentation variation that can impact the computer generated ASET maps (as you appropriately point out), there are also photo setup variables and post-capture editing that do the same to actual LP images - often to a much greater degree.

Dual light map reports are an excellent way to validate hearts and arrows claims on diamonds offered without LP images, and to validate the photos of diamonds offered with them.

 

[John P]

To be clear Bryan, I'm not referring to photo validation. I'm referring to the diamonds themselves.

Most of our sales occur in showrooms, so no photos are involved. When our diamond is shown in the ASET viewer, associates regularly point out how some asymmetry or artifact that appears on the grading report's scan-generated imprint isn't present on the actual diamond itself. It happens with enough frequency that it has become a point of training.

RE photo setup and execution, and error to a greater degree, we are on the same page.

 

[Texas Leaguer]

To be clear Bryan, I'm not referring to photo validation. I'm referring to the diamonds themselves.

Most of our sales occur in showrooms, so no photos are involved. When our diamond is shown in the ASET viewer, associates regularly point out how some asymmetry or artifact that appears on the scan-generated imprint isn't present on the actual diamond itself. It happens with enough frequency that it has become a point of training.

RE photo setup and execution, and error to a greater degree, we are on the same page.

Gotcha, that makes perfect sense.
The viewers themselves are somewhat different in that they only approximate the mathematical construct of the LP grading environment. E.g. the stone is closer than 25cm to the eye in physical viewer.

 

[bmfang]

I'd add that 3D scanners have some given linear/angular error, so these computer generated imprints are not 100% faithful to the diamond. The results are useful for placing the diamond into a broad performance grade, but not for making minute judgments regarding optical precision.

When given the choice between computer generated images based on Sarin/scan data vs actual scope images, I’m always going to prefer the latter option. Computer generated is infinitely more useful if a vendor declines to provide any scope images to a customer.

 

[Texas Leaguer]

When given the choice between computer generated images based on Sarin/scan data vs actual scope images, I’m always going to prefer the latter option. Computer generated is infinitely more useful if a vendor declines to provide any scope images to a customer.

Or when the images are provided through the virtual database and not actually taken by the merchant offering them up. Lab generated light maps are a reliable cross check to verify that the correct images have been uploaded to the correct listing.