Mineral: Pyrite, Calcite (pseudo after Anhydrite)
Locality: Niccioleta Mine, Massa Marittima, Grosseto Province, Tuscany, Italy
Dimensions: 17 x 10 cm

Description: Cubic crystals of Pyrite up to 4 cm, some of which with skeletal growth, accompanied by tabular crystals of Calcite pseudomorph after Anhydrite.

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