Urner Mineralientage
http://www.mineralienfreund.ch/mineralientage-01.html1-2 september 2018
2-3 september 20173-4 september 20165-6 september 20156-7 september 201431 august - 1 september 20131-2 septemberPersonalhaus Fa. Dätwyler
Gotthardstr. 31, 6460 Altdorf, Switzerland