Here's the deal, as I see it.
It's really not about the accuracy of an EGL report.
Having examined many hundreds of diamonds with EGL reports over the years, my opinion is that they are right on many occasions. However they ( EGL-USA) are NOT right nearly as often as GIA.
It's certainly possible for GIA to make an error- we're talking about grading of diamonds, which is going to invlove opinion- in borderline cases especially.
Accuracy ( or lack thereof) is not the only thing that causes dealers to use only GIA.
There's the fact that all the other labs can do for credibility is to claim they have GIA trained graders.
Forum regulars know that important diamonds are traded based on only one lab. GIA.
For example- pink diamonds. Any high dollar pink diamond MUST have a GIA report.
Dealers must know this.
That's why it really gets my goat to see sellers purposfully attmepting to cloud the issue.
Anyway, the point of the whole diatribe is that some categories of high dollar diamonds with EGL reports is far more acceptable in the trade.
Clarity is the number one reason I see.
Ths diamomnd would have gotten an I1 clarity from GIA- heck, it might have.
There's plenty of cases of cutters trying to wring a higher price out of an I1 by getting a different report with say, an SI3 grade. Which GIA does not give.
This is such a diamond. ( Please ignore the tag calling it SI2)
ITEM #: R2020
Pear Shape Diamond, Loose
WEIGHT: 3.01ct
SHAPE: Pear Shape
COLOR: E
CLARITY: I1
MEASUREMENTS: 12.62 x 7.78 x 4.90 mm
TOTAL DEPTH: 63.0%
FLUORESCENCE: NONE
Price: $21300



This one did have an EGL report- which we (accidentally...oops) threw away.
But that's not neccesarily a reason not to consider an I1 diamnd.
Of course I don't need to be concerned about a seller convincing me that this is equivalent to having a GIA report.....