The problem you're having is that you're unable to view purchasing a diamond in non-economic terms. It isn't "absurd" or "non-advanced," nor are people "duped"

The problem you're having is that you're unable to view purchasing a diamond in non-economic terms. It isn't "absurd" or "non-advanced," nor are people "duped" into making "supremely poor financial decisions." People aren't as dumb as you think, they know that a rock doesn't really represent anything, but they enjoy giving and receiving diamonds, and pretending that they do symbolize a commitment, and sharing that belief with friends and family. You think my previous comment is "devoid of reason" because it's about ritual and symbolic gestures, not about economics, concepts you either cannot comprehend or choose not to. Which is fine -- most atheists believe they are wiser than believers, for example -- but no amount of rationality or logic is going to change people's minds.