I'm looking for a round diamond in the 1.3 carat range with a very nice cut and on the better side of color and clarity. Clean to the eye is definitely a must. My total budget is in the $15k range but of course I'd be happy to spend less. Probably like most amateurs, I struggle with the subtle differences and why two seemingly similar diamonds will be priced 20% differently. Anyway, are there any red flags in the ones that I have linked below or any indications that one may be cut better than the others? Any other stone suggestions you have would also be very welcome. Thanks!
http://www.jamesallen.com/loose-diamonds/round-cut/1.30-carat-f-color-vs1-clarity-sku-362867
http://www.bluenile.com/diamond-details/LD01927381?keyword_search_value=LD01927381
http://www.bluenile.com/diamond-details/LD04220410?keyword_search_value=LD04220410
http://www.jamesallen.com/loose-diamonds/round-cut/1.30-carat-f-color-vs1-clarity-sku-362867
http://www.bluenile.com/diamond-details/LD01927381?keyword_search_value=LD01927381
http://www.bluenile.com/diamond-details/LD04220410?keyword_search_value=LD04220410