Grimselite

Small yellow crystals of grimselite
Origin: Gerstenegg/Sommerloch tunnel, Grimsel Region, Hasli Valley, Bern, Switzerland
Picture size: 1 mm
Owner: Thomas Witzke
 

Photo courtesy of: 

Thomas Witzke

Institut für Mineralogie und Lagerstättenlehre
Aachen, Germany

 

Tiny yellow green transparent crystals on matrix
Origin: Jachymov, Bohemia, Czech Republic
Sample size: 2.5 x 3.5 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

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