See, for me it's the exact opposite. "Oh cool, you dug up a shiny old rock that's been in the earth for millions of years." vs for me, man-made diamonds say:

See, for me it's the exact opposite. "Oh cool, you dug up a shiny old rock that's been in the earth for millions of years." vs for me, man-made diamonds say: "We used cutting edge technology that can simulate the weight of an entire mountain over a tiny area to make an shiny thing!" My wife and I are suckers for cool tech. A man-made diamond will forever be cooler than something that happened naturally over millions of years.