Vice Versa! That's it! Thank you, John k! They were having some kind of Jane Austin marathon the day I saw it, so I assumed the movie was an adaptation of one of her stories.
Glad I could help.
After googling Jane Austin to within an inch of her life I moved on to various permutations of the "magic stone" and "grown man/little boy" aspects. An hour in, I'd almost given up when bingo!----there it was. :=)
I tried to access the tcm schedule for the month of June, but it would only show the name of a few movies, which wasn't much to go on. Turns out the movie has nothing at all to do with Jane Austen.