Tea leaves are quite messy I find, and inherently imprecise.
Bones are rather limited, they yield little data. “Yes or No” really.
Crystal balls regularly twist space-time and introduce weird quantum effects. Einstein didn’t like that and neither do I.
No, Chinese turtle shells are the way to go. Sheep’s livers might work as well, but go try find a qualified haruspex these days.
Ahh the reading of livers and entrails. An oldy but a goodie