Mineral: Pyrite
Locality: El Santuario Mine area, Municipio Ubalá, Eastern Emerald Belt, Cundinamarca Department, Colombia
Dimensions: 9 x 10 x 10.5 cm

Description: Mass: 2400 g MIM number:2123 Very large iron cross twin, perfectly formed on all sides, consisting of two interlocking dodecahedra forming an angle of 90 ° between them. These crystals which are typical of this mine were thought to be limonite pseudomorphs after pyrite, but turned out actually to be pyrite crystals with a thin surface veneer of goethite. Photographer: FMI / James Elliot

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