Would a dead parent's wedding/engagement ring count? I assume not.
I got Mrs Jobe's engagement ring brand new, and our wedding rings will be new too.

I wouldn't second hand ones purely because I would want them to be ours, and have no other history. The superstition thing would not be the reason.
( Jobe, Fri 10 Jul 2009, 10:19, archived)

What about if the diamonds are conflict stones?
Or the gold is from melted down puppies?

You'll always have history in a ring.
( Maximinimus you stick around I'll make it worth your while, Fri 10 Jul 2009, 10:24, archived)