Osage makes great firewood, for in a furnace or wood stove. Way too many "pops" and sparks for the fireplace.
When I was 19 or 20, the mid-west was coming out of the Mid 70's post Vietnam recession. I looked at buying a TD-7C International bull dozer that had 900 hours on the tachometer. The seller said it had about 1000-1200 more hours on it, but he disconnected the tach, as the machine was a stationary powerplant for splitting Osage fence posts. He made a splitter out of a 8' hydraulic ram. The machine looked in very good shape, I was really thinking about buying it. On the way home, dad suggested we stop buy the feed mill. We pulled in and ask if the had any Osage fence posts? The owner said Heavens yes! He had been selling them by the thousand for 10 years but his supplier was having trouble finding any Osage to use now days. I never talked to the dozer owner again, I just figured, for the price of the rebuild on the hydraulic system and his price I could almost buy a brand new TD-7E! I ended up a brand new, but smaller 500-E, with a 35 ton winch on the back for almost $8 grand less! I could fell a 2 to 3 foot tree with the dozer faster than with a chain saw, and the root ball was already out of the ground! Great way to clear old fence rows!
Ivan