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Identity HelpWho can tell me what kind of mineral this is?

17th Aug 2019 14:36 BSTTarik Re

03334330015660488116355.jpg
this one was completely black. I cleaned it with vinegar.

17th Aug 2019 18:45 BSTUwe Kolitsch Manager

Looks like a broken pyrite/marcasite concretion.

17th Aug 2019 23:51 BSTPaul Brandes Manager

I would tend to agree with Uwe.
Just as in your other post, Tarik, please read the following page before posting any identification-type questions.

18th Aug 2019 16:44 BSTMatthew Droppleman

Pyrite
 
Mineral and/or Locality  
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