Ann: Thick, high-grade Niobium-REE at Aileron - West Arunta, page-64

The 0.3% was not my comment.

However, according to the Australian Government Geoscience website:

Australia's niobium resource is confined to a few deposits, largely as a by-product or co-product of rare earth element or rare earth element-zirconium mineralisation in peralkaline rocks and carbonatites. Examples of these include the Mount Weld carbonatite (Western Australia), the Toongi Trachyte, which is the peralkaline host for the mineralisation of the Dubbo Project (New South Wales) and the Brockman deposit (northern Western Australia).Reported grades in these deposits range from 3100 to 3500 ppm (Toongi, Brockman) to 7400 ppm (Mount Weld).

The assayed grades of 0.6% to 1.9% of TREO are also significant, as it firms up the case for niobium even as a co-product or by-product -- if that's how things pan out.

IMO & DYOR