A few quick questions...1.) If a 1A cut is an AGS 0 cut - what would a 2A be?2.) If I find a diamond listed as 7.69 - 7.72 and find another diamond listed as 7.76 - 7.79 would the extra diameter be noticable and worth the extra money?At what measurement do you start to notice a change in size?3.) What is the prices difference for a 1A diamond and a 2A diamond? 5%, 10%, 15%...Thanks!