Any clues on these rocks

[nickpet]

Whilst looking for samples in central Australia a mate of mine came across these rocks..any clues as to what they are?

 

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[nickpet]

Whilst looking for samples in central Australia a mate of mine came across these rocks..any clues as to what they are?

 

[rock]

Kinda blurry so it is going to be a guess. Welcome to the site! I would say it is a bi product type of metal. Run a MD over it and see if it sounds off.