I'd agree. I did not read what this stone is or what it's going to be
used for, but it sounds like a lovely mantle piece.
For now it deters armadillos from pushing under a fence into a garden.
I'd make very sure it was supported well, or don't let the baby sit on
the hearth.
Coincidentally, speaking of support, that three inches of rain we got
Saturday finished the job on something at the top of the old stone
chimney. My foggy memory says I put a piece of plywood on the flu
hole, then a piece of metal, then some stones. Something changed
during the storm. A stone came down that I would guess weighs about
fifty pounds. Its corner went into the ground several inches. Glad
people and dog were not there when it fell. If the gods were fair, an
armadillo would have been right there at the moment of impact.