Mineral: Quartz (variety smoky)
Locality: Zinggenstöcke, Oberaar Lake area, Grimsel area, Hasli Valley, Bern, Switzerland
Dimensions: FOV 8 cm

Description: Here you can see that it is not damage what is visible on the top, it is a kind of incrustation where brighter parts of the quartz have grown over the nearly black parts of the crystal.

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