most common crystals of pyrite are the cube, the octahedron and the pentagonal dodecahedron, also called pyritohedron. The most characteristic twin is the iron cross, formed by two interpenetrating pyritohedral. When no crystallized in the form of compact masses, granular, nodular, etc. Sometimes he acts as fosilizante material.
Chemical Formula: FeS2
Etymology: from the Greek pyr (fire)
Crystallization: cubic system
Density: 5 to 5.5
Hardness: 6 to 6.5
Color: Yellow
Brightness: metallic
Raya: greenish black
This issue can be seen at the Museum Achievement Award.
