Fahlore

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.

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