Mineral: Quartz (variety japan law twin)
Locality: Miage Glacier, Veny Valley, Monte Bianco Massif (Mont Blanc Massif), Courmayeur, Aosta Valley (Val d'Aosta), Italy
Dimensions: 52 x 33 mm

Description: Rear view, where the twinning is more hydiomorph and where you can observe the same phenomenon on the small crystals.

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