Mineral: Quartz, Chlorite Group
Locality: Simplon railway tunnel (south section), Trasquera, Verbano-Cusio-Ossola Province, Piedmont (Piemonte), Italy
Dimensions: 56,7 x 37,5 mm

Description: The main crystal, with Tessin habit, is double terminated and interconnected with a double terminated smaller crystal with prismatic habit.

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