@Kachina624Whoa! Do a Google search about diamonds. I've seen lovely diamonds set in sterling in many museums. Also Tiffany is currently selling a whole line of diamonds in sterling. I don't think we can go by the metal - you havve to know something about the diamonds, too.
I have one piece of Affinity which is lovely - compares well to a similar piece Saks used to sell for 11X as much! And in neither ring are the diamonds major enough to have a sensible reason to care. They're paved (in both rings) and would have virtually no resale value in either case..
I'm out of the diamond and gold market - there's nothing anywhere that I want which isn't so expensive it would have to have wheels on it to interest me! I'll wear what I already own. Gold has come down a bit from its high but diamonds are still extremely expensive -- and the combination of the two?? Ouch!