An excellent cluster of well defined and sharp crystals of Calcite from the well known Umlaufstollen of the Göscheneralp. The white Calcite is excellent terminated, highly lustrous and lucent to transparent. Some of them are doubly terminated and accompanied by minor matrix. This fine specimen was found during the construction phase of the power plant 1955 - 1962. Such items are history since decades and consequently exceeding hard to come by.