I said alex's are expensive, not beautiful, lol. The best ones are, actually, but they're in museums or Sotheby's auctions and sell for tens of thousands of dollars per carat.
My old family jeweler, who did the family's appraisals, was also a certified gemologist.
That's good to know. There's no known treatment to enhance chrysoberyl. You made a lucky buy.
I'm amazed to hear your comment about Tiffany. Switching stones just isn't their style but employees can't always be trusted. All jewelers I know guard their integrity and reputations like their lives.
Yes, I was shocked when my friend told me that someone at Tiffany had switched stones on her. I have NEVER ever heard of anything like that happening before or since. I suppose that they fired the person who made the switch, IF he/she was ever found and as I said, they replaced her stone with one of same quality. And since Tiffany will only repair a piece of their own jewelry, of course they knew what that piece had originally contained.
I might add that it didn't hurt that she was/is a valued customer, who has bought lots of things from Tiffany.