The mineral pyrite, or iron pyrite, is an iron sulfide with the formula FeS2.

Color: Pale brass yellow.

Density: 5 - 5.02, Average = 5.01

Diaphaneity: Opaque

Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (***** quartz).

Habit: Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.

Habit: Stalactitic - Shaped like pendant columns as stalactites or stalagmites (***** calcite).

Habit: Striated - Parallel lines on crystal surface or cleavage face.

Hardness: 6.5 - Pyrite

Luminescence: Non-fluorescent.

Luster: metallic

Magnetism: Magnetic after heating

Streak: Greenish black