GIA Diamond Certificate Myth Explained

White VS Black ASET for Diamond. What is the Difference?

Hello everyone, in this video I'm going to talk about the ASET (Angular Spectrum Evaluation Tool) scope and whether there is any difference if you capture them under a white or black background. We've received many questions about this and it's probably about time I make a video to explain it to you guys.

Now before I move on to the nitty gritty details, I have to explain to you on how the ASET scope works. The purpose of the ASET scope is to analyze the light return of the diamond, why this is useful is because it basically tells you how brilliant and fiery your diamond is by measuring how much light is going in and being reflected back out, and also it reveals to you if the diamond have any severe light leakages.

How this works is by placing the diamond on a lighted background and the ASET scope on top of it. The light from the lighted background will bounce off the scope into the diamond and back out into your eyes. Under the scope this is how a super ideal cut or highlight performing diamond will look like, the red areas represents intense light return which is where the brightness of the diamond will come from. Green areas are weaker light return, blue is contrast and white is full light leakages.

Another way to take the ASET scope is by using a black lighted background which somewhat works the same way. This is the same diamond taken with a black lighted background. It looks pretty much the same. The red areas are slightly darker but represents the same thing, arrows are still blue which is the contrast, the greens are slightly darker green but still the same color and however the full light leakages which were white are now black. So you just need to remember that light leakages are now black in color. Other than that, there's nothing out of order here.

However what happens if we take a poor light performing diamond? Over here I have an ASET scope of a poor light performance diamond under a white lighted background. You notice at the middle area of the diamond there are lots of white areas These are all bad light leakages that you want to avoid at all costs. Here is the same diamond on a black lighted background just look how different it is. All the full light leakages have now become red in color. This is because on a white background lighter red remains as light red, but on a black background light red becomes dark red. So what happens is you're mistaking all these light leakages in the middle as intense light return.

This can be very confusing to consumers as they are a complete opposite of each other. You will also notice that some of the white areas are now dark green in color.

Here is another example of a fancy shape cushion diamond. See the big difference? The diamond looks so much better on a black lighted background as it changes the light leakages to look like light returned. All these massive light leakages become green which is mistaken for weaker light return.

Now here's another example again using a pear-shaped diamond. So you get the drift of what's happening here?

So this is your answer guys it does make a huge difference if the ASET is taken from a white or black lighted background, this is why all the ASET scope images we provide are in the white background only. We believe in full transparency and all consumers deserve to know the full information of the diamond they are getting.

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White VS Black ASET for Diamond. What is the Difference?