I am simply stunned by the loving, practical, wonderful suggestions given by all. BillinAla;, at lunch today with a dear friend I came up with the shadowbox idea- the weird thing is, I was thinking aloud about it at just about the same time you were posting this!! (theme from the Twilight Zone drifts by...)
As for restoring the thing, except for those prayer pieces, the shards are so tiny, almost dust, and I'm not much of a believer, but if Rick and you others say it's possible, it must be true...
Mountain Dog, your ideas are wonderful- if I don't go for total repair, I think I'll try your "fidget piece" as well as the shadow boxes. Maybe a few pieces could be a brooch for mom as well.
And Audi, you brought tears back into my eyes again, but not painful ones. What a wonderful idea- go shopping for Granny! She loved pretty china, I still have several precious antique demitasse cups of hers- this may be the final therapy I will need.