Pyrrhotite

Pyrrhotite is an iron sulfide mineral. Pyrrhotite also called magnetic pyrite, because the color is similar to pyrite and it is weakly magnetic. The magnetism decreases as the iron content increases.

Pyrrhotite is generally tabular and brassy/bronze in color with a metallic luster. The mineral occurs with mafic igneous rocks like norites, and may form from pyrite during metamorphic processes.

It named in 1847 by Ours-Pierre-Armand Petit-Dufrénoy. “Pyrrhotite” derived from the Greek word “pyrrhos” meaning flame-colored.