Nothing wrong with this answer! I actually wanted to know what YOU would do! Earrings would be awesome. Would just need to find a match for this one haha! So easy! These things grow on trees!
Rather than a diamond halo I would set it in an illusion setting of gold so that it retains the vintage look. I had my OMC made in a custom setting and love the design. It looks much bigger than it actually is! The only difference for your stone is that I would change the prongs and have something more delicate. I had to have chunky claws to hide a chip on the stone.