Light Return Very Good
Fire Good
Scintillation Good
Spread
or diameter for weight Very Good
Total Visual Performance 3.6 - Very Good - Worth buying if the price is right
I'm really wondering why you are going with an IF. You are paying for overkill in clairty. If you went with a VS you should be safe.
Light Return Excellent
Fire Excellent
Scintillation Excellent
Spread
or diameter for weight Very Good
Total Visual Performance 0.8 - Excellent
within TIC range
Light Return Excellent
Fire Excellent
Scintillation Excellent
Spread
or diameter for weight Very Good
Total Visual Performance 1.1 - Excellent
within TIC range
If you call JA they will evaluate up to 3 stones at a time to tell you which one is the best, they will also make sure they are eyeclean, Make sure you get the pricescope discount.
Here is one from GOG, you would have to call for pricescope price
In the long and the short of it, I would go down in color and clarity to get the best cut possible. If it is in the DEF range you are not going to see color, if it is in the vs catagories you should not see inclusions, although you can verify with vendor to make sure it is eyeclean. Cut is the most important thing, you will see that!