I was out in the woods looking for a certain shaped branch, which I found, but I also found a rock that I think is petrified wood. Here’s the branch I was looking for; the old timers used one like it for riving white oak shingles. It’s on a shave horse, where I used a draw knife to remove the bark.
Pictures of the rock I found are below. There are what appears to be wood grain all around this rock. Some of the grain goes around what looks like knots.