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Sphalerite var. Marmatite Nice group of Calcite crystals of 56.84 mm Area of 23.74 mm with two groups of Sphalerite crystals (Author: Matteo_Chinellato)

Sphalerite var. Marmatite
Nice group of Calcite crystals of 56.84 mm
Area of 23.74 mm with two groups of Sphalerite crystals (Author: Matteo_Chinellato)