HI Everyone!
This is a recurring theme- but it bears repeating.
There's no formula that consumers can use to "discount" an diamond "certified" by a non GIA lab.
This happens to be a lovely diamond.
It's a great color
The "layout" is nice- a lot of size for it's weight.
The imperfection is of a relatively"desirable"  nature and placement.
None of that wold cause GIA to grade this diamond SI2- as it was graded by an EGL outside the US.

I'm betting it would come back F color, maybe even G, with a clarity grade of I1 from GIA.
You can't grade diamonds from photos, but these give you a very good idea of the nature of this imperfection. It's too severe to garner an SI2 from GIA

I suppose the reason sellers continue to promote stones with such inaccurate grades is their success in selling them to uninitiated consumers.

Here's the key: The difference in price, based on the industry price guide is about double. Hefty motivation.

It bothers me as a diamond grader to see this going on- but more as a human guy- who detests lack of transparency in business.

Good question Shiba- I should have pointed it out better

Bear in mind that a grading report is first and foremost a marketing tool for the seller - particularly for the retail seller. At this point, as a lab, you have two choices:

1. You establish yourself as the reference for the consumer. The seller buys your services because it helps his credibility. That's what GIA and AGSL do.

2. You do what the seller wants - grade soft. The seller buys your services because it helps him position the stone where he wants. That's what most other labs do.

Unfortunately, route 1. is the toughest to take, and once you start straying onto route 2. it's very difficult to recover and go back.

Actually, now that I think about it, there is another reason, which I summarily described as "Route 1 being tougher": it's also a lot more expensive.

Gosh, she is a nice size!