A beautiful "floater" specimen of the so-called "Fensterquartz" from a fairly old find in the Alpine deposit Val d´Illiez of Monthey in Valais Canton, Switzerland . These skeletal Quartz specimens are mostly called "Fenster" (German word for window), due to the fact that the pyramidal and prism faces have a skeletal form that gives them the appearance of a window. The brownish coloured inclusions are some kind of pocket clay that was frozen inside of the Quartz as it was crystallizing. Where there are no inclusions, the Quartz crystals are water-clear, and have sharp, glassy surfaces all the way around. A very interesting doubly-terminated specimen of this unusual and aesthetic material.