Maybe I'm spoiled as a nerdy (and interested in nerdy) gay guy, but I pity those in this thread saying that their fiancee wouldn't listen to reason about this. It slays me that "tradition" is so important to people that they will waste such vast amounts of money and prop up such a gross, violent industry in the face of reason.
It irks me a little bit that the issue is painted as one of "reason" versus lack thereof. There is a rationality in adhering to social convention. My wife is a diamond nerd, as well as one of the most rational people you'll ever meet, and she'd explain it this way: the diamond is a test that serves various useful purposes from the perspective of the woman: 1) It demonstrates the man's ability to provide; 2) It demons…
2) See: 1)
3) It demonstrates to the woman's peers that she is shallow enough to respect social standing over more admirable (and important) qualities, unless they're just as shallow.