You have to think that a bat made from purpleheart or zebrano or
karelian birch would look magnificent, but probably not be strong
enough for anything but bunting. I note no mention of min/max weight -
and I'm sure there must be. So although theoretically any wood could
be used for a bat, some (like lignum vitae?) would probably be
automatically excluded because of their heaviness.

FoggyTown