Unusual rock

[Paul2204321]

Hi. May be someone can help me to identify this rock. It was found in the forest. I polished small piece of it. Stripes on polished side are not scratches. It is a structure of mineral. Also polished side looks more black than metal (pictures were made in led light so its shine like a metal). Its magnetic. Not very strong. Something between stainless steel and iron. Density is about 4,5-5 g/cm3. It scratch ceramic.

 

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