I have just started looking for engagement rings. I recieved a list of things that my girlfriend says she wants. She admits not knowing everything, so some may be bad info. I know nohing about the topic, but want to learn before buying. Here is what I got: She wants a round brilliant shaped, ~.75 carat, vvs2 or better, F or better diamond, and no flourescence. I have no idea about what to worry about with cut. I do hope to spend between 3000 and 4000 on this ordeal due to huge med school debts, and still being in school. Is this realistic, what should I look out for, and other advise? Thanks.