My periodic table poster is now available! Pyrite. Description from the source: Pyrite (Fe S2 cub.), Huanzala`, Peru`. Little, perfect crystal cluster. 1,5x1,2x1 cm; 5 g. Source: Simone Citon Contributor: John Gray Acquired: 30 September, 2008 Text Updated: 1 October, 2008 Price: Trade Size: 0.6" Composition: FeS2