HI Bigjohn ! I didn't realize Bismith was a real element. I mainly know about Bismith, the really funky looking multi-colored ones that are marketed, and made in a lab. When talking about Bismuth, I would think most people refer to the synthetic kind. I will admit this is very beautiful, but I still can't bring myself to buy any man-made crystals. I must admit I've been very tempted.
Scientists are great ! I love all the progress humanity has made. Again I thought we were talking about synthetic or treated crystals when we were referring to modern day alchemists. In which case I still denounce them as fraudsters.
Synthetic rubies and emeralds have been around in true form for over a century. I still think it's cheating myself. I don't get excited over synthetics at all. I look at it sort of like a counterfeit bill. The beauty of these specimens is not in question, as you say, they have many if not all of the physical properties of a natural stone. I still don't think your wife will appreciate a fake, er sorry I mean, synthetic stone in her wedding band.
As for the metaphysical store, I think it would depend on the store itself and the owner. I think some may screen their inventory well, and other not so much or even know their supply.
I guess I would buy a specimen that hasn't been cleaned or touched up yet, provided the discount worth it.