"Preliminary X-ray Diffraction (XRD)
analysis indicates that the main lithium minerals present are petalite and spodumene and no lepidolite was observed."
So potentially worthless if mostly petalite rather than mostly spodumene. I'm fairly sure they would have simply said "spodumene is the main lithium mineral present" if it was mostly spodumene too, so probably >50% petalite.
