My husband and I plan to place crown molding in our family room. After looking at many pictures in Houzz, I find that I prefer the crown molding that goes completely around the fireplace, as opposed to stopping at each side. He has installed crown molding before and owns his own power miter box, but he is unsure about applying the crown to our stone fireplace, as it has many irregularities in each stone, and there would be gaps between the stone and crown. Any ideas or expert opinions on how to do this would be most welcome.