OK, but there's a real difference. My wedding band has small diamonds in it, and occasionally I'll be sitting inside where the sun falls on my hand and casts a million pretty blue and white and red sparkles on the walls and ceiling of the room I'm in.

Diamonds (and other gems) really are beautifula to look at in ways that glass just isn't. And manmade ones, sparklier still out of the forge of our own cleverness, are much nicer in my opinion.