News: RDG Resource Development Says HY Revenues From Continuing Activities A$21.7 Mln, page-6

Your completely correct.Their track record of keeping share holders up to date is not great.
It is a very long term asset (probably 50 years cash flow potentially) and you cant find large commercial deposits of industrial grade alluvial garnet with little to no impurities close to sea transport.

conservatively should aim for them to get $100 per ton ebitda for simple maths 100k tons = $ 10 mln ...and sustainable earnings from here on

They announced large drilling campaign last year and i expect the results of that drilling and data to be released probably mid year.
Combined with "reaching 80% name plate capacity by mid year " (circa 100k tons ) things are going in the right direction for good news by middle of the year.

Peleton - pilot plant for rare earth extraction being built now ,may also have some news mid year.
its definitely cheap here at 5.5 and little to no liquidity ..so good news should see the stock move through to the 8 to 10 cent trading range in second half of the year potentially.

Remember Mineral resources owns circa 80% of RDG ...so dont be surprised if potentially RDG aquires other assets that a really good and pass the "Corporate test" at Min res and end up in RDG because the asset is too small for min res to pursue.

Either way ...for "a minno" like RDG ...great place to be and have "big brother" support

its cheap !!