Year doesn't match the design, the denomination is missing, QEII effigy is too small (the top of the crown should be at about the same height as the bottom of the word "AUSTRALIA") the lustre/finish is all just wrong. With those discrepancies it's unlikely to be plated tungsten, so I'm betting either the weight or the thickness is grossly out of spec as well.
As others said, missing the denomination and looks way too shiny. The fakes are getting better all the time, scary stuff
I have one similar that I was given except the one I have has both date and denomination so in essence a "forgery", your coin looks like the one I have and is clearly a "copy" coin and not real gold. Not illegal to make or sell copy coins although I do not agree with it! The problem is the majority of the population do not buy gold coins because they cant afford to and although this coin was always intended to dupe the original buyer into thinking it was genuine the public at large couldnt care less! Araldite it to a footpath and watch passers try and pick it up