You can just order brand new ones from China for even cheaper I imagine. https://www.npr.org/2019/03/14/703472647/saying-i-do-to-lab-...

Just make sure to pay your taxes and avoid decaf coffee, otherwise some college kid is going to buy one for you and install it in your basement porta-potty time machine.

I learnt a lot about Colonial America from that game

I bought mine from therealreal.com. I got a lot more ring than I'd normally be able to afford, and it's an elegant design you don't see everywhere.

Check with the recipient beforehand, of course. You're not the one who has to wear it, and no amount of logic is going to change a mind that wants a brand new, natural diamond.

Yes to all your questions. Be wary though, especially at pawn shops. Those places are not bastions of integrity.