Matthias Minerals: 05 Feb - 11 Feb 2018

Příbram District, Central Bohemian Region, Czech Republic

Furka Basis Tunnel East Section, Realp, Urseren, Uri, Switzerland

Picher Field, Ottawa County, Oklahoma, United States of America

Aurora Mine, Ramsbeck, Bestwig, Arnsberg, North Rhine - Westphalia, Germany

Wolf Mine, Herdorf, Altenkirchen, Rhineland-Palatinate, Germany

Söllnkar, Krimmler Ache Valley, Hohe Tauern, Salzburg, Austria

Panasqueira Mines, Covilhã, Castelo Branco District, Portugal

Egremont, Cumbria, United Kingdom

Naica Mine, Naica, Saucillo Municipality, Chihuahua, Mexico

Furka, Goms, Valais, Switzerland