I am so sorry that happened to you and Granny Mary. It is just so incredible, but some people would steal the eyes out of your head if they could get away with it. I think I would have a very hard time leaving anything of value (sentimental or monetary) there in the future. If it were me, I don't think I could make and leave another quilt with her there. I'd go for a nice blanket.
Too bad. Just too bad and too sad. But remember that whatever we put out into this world, both good and bad, returns to us tenfold. You are a good person, and good will come to you. The thief will also get his/her just reward, in time. Maybe the thief will see the connection when it happens....