Mineral: Pyrite
Locality: Gavorrano Mine, Gavorrano, Grosseto Province, Tuscany, Italy
Dimensions: 33 x 32 mm

Description: In a group of cubic crystals a pentagonal dodecahedron. The silky luster of this last one is due to parallel growth facets of dodecahedron (on the faces) and of diploid (on the edges). The lustrous rectangular face belongs to cube.

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