Hello - I''m new here. Great source of info ! I have a couple of questions. When buying a diamond , what is the most important "c" , and in what order should they go ? { Cut , color , etc }. Also , if I can get more diamond for my money on the internet , then that is most likely the route I will take. At a quick glance , the size I can afford will generally be around .75 carat. Would anyone know of a website , or even a picture here , that I can view that would represent an approx .75 carat diamond? I am just trying to get an idea of how big it is . Last question , and pardon my ignorance - what is a "PS''er" ??? { I''ve seen it on this site several times} .