Description

Quartz crystal featuring the rare and highly sought-after macle du Japon, also known as macle de la Gardette.
The whole is fully crystallized, and a small brown siderite crystal with a lustrous patina is present at the intersection between the two crystals.
Two crystals interpenetrate at 84.33° and share part of their crystal lattice.
This piece comes from a deposit near Vizille, in Isère, the former Halles à Vaulnaveys iron mine.
This deposit is not far from Grenoble, and a few dozen kilometers from the La Gardette mine in Oisans, which gave its name to this famous macle, following a publication describing it in 1833.

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