That's a good perspective. I'm not sure how relevant "demonstration of your means" is to modern society but "seriousness" certainly implies that it cost a sign

That's a good perspective. I'm not sure how relevant "demonstration of your means" is to modern society but "seriousness" certainly implies that it cost a significant amount. Most counter-arguments I hear object to the cost, without acknowledging that the cost is not created by the artificial scarcity of a diamonds, but rather the proposer's implied seriousness.