Fahlore

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Fahlore, or Fahlerz, refers to an ore consisting of complex sulfosalts, mostly the series between tennantite (Cu6[Cu4(Fe,Zn)2]As4S13 and tetrahedrite (Cu6[Cu4(Fe,Zn)2]Sb4S13. It comes from the German word for pale, fahl. This refers to the characteristic pale grey to dark black colour.[1][2]

Fahlore with quartz from Dillenburg, Nassau, Germany. This piece is from the Mineralogical Museum [de] of the University of Bonn, Germany.

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