The first thing to decide when purchasing a diamond rings is the shape of the stone. There are nine major shapes of diamonds.
When looking at the general appearance of fancy diamond stud earrings, make sure that the stones are appealing to your eye and that their are bilaterally symmetrical.
Flawless GIA Certified Diamond are no more beautiful to the unaided human eye than a grade in the middle of the scale. Once again, extremely subtle differences in clarity are very important to determine rarity, but only affect beauty when in the very low end of the scale.