Yes,
Brinniel, you are right, and I hadn't quite forgotten. That stone was the replica that Carl had made at the fireside after he had given the original to Shea. Thanks though, for keeping a watch over my own meandering mind.
I will see if I can't make the post a little bit clearer at lunch. (Might tack on a bit more to the end as well.)
You could go ahead and have Shea give the original back to Carl. I think it might be nice to have it show up after he tried to put the situation past him. I do wish Brenna hadn't died.