Fool's gold
Gold, fool's
Iron pyrites
Marcasite
Pyrite
Fe
1
S
2
  
 
Minerals with the same name may vary widely in appearance and composition, and very few are >99% (reagent grade) pure.

Gram formula weight (molecular mass) = 119.97
Melting point = 1171 °C


Pyrite has a highly distinctive structure: iron is not in the (IV) oxidation state. Minerals may vary in elemental composition and impurity levels.
Wikipedia Page:

Pyrite
is defined with respect to the entities below:
The entities below are defined with respect to:
Pyrite
Mineral (generic)


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