Local guy.
He could be selling me a glass fake for all I know.
Key issue is he has to make the ring.
It is a special nurses / healthcare worker ring.
No edges. Nothing to snag. Nothing to cut a person with at all.
Trained/Certified by the Gemological Institute of the Americas or some such crap.
Sure, get a DeBeers Diamond, its really the only one to get right now. Most of the Synthetic ones are "taken" off the market by some as yet unknown presence.