jordi

Thank you for the answers How do you explain the "vegetal coal", in terrestrial rocks? I can erode it with my nail... It must be slag or simmilar...

Little metal spheres are perfect, but not the big ones.

I found this rock years ago, It has parts that seems like vegetable coal because I can erode with my nail, there are and some esferical, not a perfect spheres, of some kind of bright metal, maybe aluminium? maybe nickel? the stone it is low attracted to a magnet if it puts on a string. it's wheight is 57gr.