Been busy doing a bit of log scrounging after driving past these particular examples a few times and realising if I didn't salvage them they would end up going to waste.Just lucky a passer by gave me a lift with the second and third ones.No need for guessing games it is Coastal Banksia and is usually very stable and dries well once quartered.In a order to get well quartered wood you can't beat a froe and maul and sometimes a wedge and sledge. Lots of pictures will tell the rest of the story.

Coastal Banksia logs

End marked with froe prior to splitting, this sets up where the log will split(usually) Got to love a log with the heart so far off centre,just made for luthiers and wood butchers like me.

Split with wedge

Nice result so far

Trimming up with froe

Nicely quartered ready for bandsaw

Closeup of what could have been firewood if it wasn't salvaged.This is the only face that has been jointed flat the rest are as they split.

Another billet for backs and soundboards
Cheers from Micheal.
Remember the "5P Rule".
Preparation Prevents Piss Poor Performance.