What did i find?

[rockcollect]

Found a huge heavy stone today but i have no clue what i found. Any info is welcom. It weighs i think 30 kilo's and has metal in it and white inclusions and i has a sort of spinifex texture from very fine to very coarse. And has airbubbles in it.

 

[rockcollect]

here some closeups of the coarse texture

 

[rockcollect]

it is slag