I am also the proud owner of a few hundred pounds of this material.
After polishing some test pieces, it does appear to be a jade.
A few years ago, I saw some photos of the original deposit in western
australia; it is an massive outcrop, and from the photos, yes, it
looked like what one might expect a jade deposit to look like.
red crust, brick red as you say, that formed in vertically oriented
joints in the deposit. stone rings like a bell, or resonates, when
struck. will hold a thin edge, fractures do not propagate, can
polish with alumina, diamond, chrome, although it can ‘apple peel’.
I would sure like to see an AA spectrometer reading to be sure.
I have also heard this material referred to as a massive tourmaline,
or a massive black schorl.