ASET Scope Variations

[lenteamd]

Looking for more detailed information about reading ASET scope images with white vs black backlighting. I am having trouble distinguishing what is strong light return vs light loss in black backlighting. Would the black backlit image be good light return or loss of light?

 

[flyingpig]

The ASET with white background tends to exaggerate light leakage, whereas one with black background hides it. The ASET with blackground does not reveal minor leakage.

Follow the link for comparison.

Help reading ASET on IDJ stud stones

Hello all, Could you please help with figuring out whether these stones are good as stud earrings & will be sparkly with fire? Thanks! Stone #1 0.5 ct J SI2 5.12-5.15 x 3.13 mm Table 58% total depth 60.9% (girdle 3.5%, pavilion 43.0%, crown 14.5%) crown angle 34.5 pavilion angle 40.8 star...

www.pricescope.com

 

[lenteamd]

So the top image would be considered a very good diamond and the bottom would be about good to very good? Is there a way to detect minor light leakages on blackground, or is it rather impossible in certain cases since good light return and light leakage look identical? I am trying to improve my ability to grade these types of images

 

[flyingpig]

So the top image would be considered a very good diamond and the bottom would be about good to very good? Is there a way to detect minor light leakages on blackground, or is it rather impossible in certain cases since good light return and light leakage look identical? I am trying to improve my ability to grade these types of images

Both diamonds are about equal in my book.

You cannot detect minor leakage with the ASET with black background.

 

[Garry H (Cut Nut)]

The second stone appears to have a little upper girdle painting.
When the pointy bits I marked in red are longer then the blue marked bits that is a giveaway.
Digging happens when the bits marked red are very very short.