Pyrite

Formula	FeS2
Origin	Minas Victoria, Navajún (Spain)
Description	distorted, cubic, golden-shining pyrite crystal
Classification (Lapis)	Sulfides
Crystal System	Cubic
Hardness	6,0 – 6,5
Colour	Pale brass-yellow, tarnishes darker and iridescent; in polished section creamy white
Streak	Greenish black to brownish black
Luminescence	none observed
Lustre	Metallic
Transparency (Opacity)	Opaque
Cleavage	Indistinct
Fracture	Conchoidal to uneven
Magnetism
Geological Setting	Formed under a wide variety of conditions
Specific Gravity	5,02 g/cm3