Thanks goldierocks.
Its been in a bath of hydrocloric acid for a few days then a bath of hydrogen peroxide to try and get it to oxidize but it doesnt appear to, its been relatively unaffected apart form its lost a slight bit of weight -
Streak is now a metallic brown colour (outside tarnish must of affected first results)
SG is @ 4.37
Sort of has a brassy iron pyrite color inside but is much more resilient than it yet is so hard its brittle some what but not so brittle that it was damaged when i went to town on it with a stainless wire brush...the brush didnt seem to hurt it at all.
Ive got no idea what it is.