It is most abundant in the hornfels and altered pegmatites, as well formed crystals of many habits and as masses intermixed with other sulfides. Color is brass yellow. Luster is metallic. Diaphaneity is opaque. Crystal Habits include simple cubes to 5cm on edge, pyritohedrons and filiform pyrite to 10mm have been found.
Fracture is conchoidal to uneven.
Streak is greenish-black.