Norbert Stoetzel Minerals: 15 May - 22 May 2018

Alte Malscheid Mine, Malscheid, Herdorf, Altenkirchen, Rhineland-Palatinate, Germany

Eiserne Union Mine, Eisern, Siegerland, North Rhine - Westphalia, Germany

Schneckenstein, Kielberg, Klingenthal, Vogtland, Saxony, Germany

Lanzarote, Canary Islands, Spain

Donnerkuhle Quarry, Hagen, Arnsberg, North Rhine - Westphalia, Germany

Virneberg Mine, Rheinbreitbach, Linz am Rhein, Westerwald, Rhineland-Palatinate, Germany

Meggen Mine, Lennestadt, Sauerland, North Rhine - Westphalia, Germany

Ojuela Mine, Mapimi, Durango, Mexico

Tsumeb Mine, Otavi Highlands, Namibia

Goboboseb Mountains, Brandberg, Dâures, Erongo Region, Namibia

Clara Mine, Oberwolfach, Freiburg Region, Baden-Württemberg, Germany

Rauris, Zell am See District, Salzburg, Austria

Not Known

Dalnegorsk, Primorskiy Kray, Russian Federation

Gute Hoffnung Mine, Bleibur, Mechernich, Eifel, North Rhine - Westphalia, Germany

Caspari Mine, Uentrop, Arnsberg, North Rhine - Westphalia, Germany

New Zealand

Nikitovka, Gorlovka, Donetsk Oblast', Ukraine

Rodna Mine, Rodna Mountains, Bistrița-Năsăud County, Romania

Niedersachsen Potash Works, Wathlingen, Celle, Lower Saxony, Germany

Sarbai Deposit, Rudny, Kostanay Region, Kazakhstan

Bou Azzer Mine, Amerzgane, Ouarzazate Province, Drâa-Tafilalet Region, Morocco

Tsumeb Mine, Otavi Highlands, Namibia

Guanajuato, Mexico