HI everyone!
There's a lot of conversation about accuracy in grading. My respect for GIA is a given- but in this case, I agree with the various EGL's that use the SI3 grade.
The reality of diamond grading is that it's subjective- there are certainly diamonds that are borderline SI1-SI2's. Or VVS1-VVS2.
There's a given range in any grade.
In the case of VVS1, it's a ridiculously narrow range.
As we go down the clarity scale, the grades get wider.
By the time we come to the dividing line between Si2, and I1, the grading is as subjective as it gets.
I have a strong feeling that 90% of the I1 grades GIA issues are disputed- if at least in the mind of the submitter.
In terms of value - reality rears it's ugly head.
If a diamond has imperfections that really affect it's overall look, it's going to be harder to sell, and therefore, command a lower price.
In that regard, not all diamonds that surpass the amount of imperfection you could honestly call SI2 are worth the same.
This pair- photographed close up- shows imperfection.
But from a foot away, all you see is the great cut.

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