fahlore

File:Fahlerz mit Quarz - Dillenburg, Nassau.jpg from Dillenburg, Nassau, Germany. This piece is from the {{ill|Mineralogical Museum of the University of Bonn|lt=Mineralogical Museum|de|Mineralogisches Museum der Universität Bonn}} of the University of Bonn, Germany.]]

Fahlore, or Fahlerz, refers to an ore consisting of complex sulfosalts, mostly the series between tennantite {{chem2|(Cu6[Cu4(Fe,Zn)2]As4S13}} and tetrahedrite {{chem2|(Cu6[Cu4(Fe,Zn)2]Sb4S13}}. It comes from the German word for pale, {{lang|de|fahl}}. This refers to the characteristic pale grey to dark black colour.{{Cite book|title=Die Namen der Steine : das Mineralreich im Spiegel der Sprache : mit einem Wörterbuch, enthaltend über 1300 Namen von Mineralien, Gesteinen, Edelsteinen, Fabel- und Zaubersteinen|author=Lüschen, Hans|date=1979|publisher=Ott|isbn=3722562651|edition=2., neubearb. und erw. Aufl|location=Thun|oclc=6356236}}{{Cite web|url=https://www.mindat.org/min-1437.html|title=Tennantite-Tetrahedrite Series: Tennantite-Tetrahedrite Series mineral information and data.|website=www.mindat.org|access-date=2018-02-19}}