Friends dad had got a ton of trees cut down, a lot of it he said was Mulberry, seems to be decent wood, read online on the btu scale it was good stuff. Question I had was, after cutting it up, on the outer edge of the cut pieces it would foam white and seem to get sticky if it got on your hands but then once completely dry it went away. Guessing it was because it was so wet. Even got sparks from the saw. Guessing its ok to burn, I see that others do? Didn't cut much due to the saw not operating properly, need to mess with the chain oil adjuster, last time I used the saw it came flying out, cleaned the saw and now hardly no oil, go figure!