This is a christmas present for my g/f. At all of the jewelry stores that I visited (kays, helzberg, zales, jared) they carry three categories of diamonds. Good, great, and premium. My budget is $1,500 for diamond studs. I have narrowed down to two options, first is a 3/4 karat premium diamond earrings, second is a full 1.00 karat but one notch down in quality in the great category. The premium is noticeably more sparkly than the other one, however the fact is that the other one is a one karat diamond. Everyones opinion is welcome, girls opinion preferred. What would guys do?