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Comments: Small yellow crystals of grimselite in matrix.
Location: Gerstenegg/Sommerloch tunnel, Grimsel Region, Hasli Valley, Bern, Switzerland.
Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag
Comments: Bright yellow coatings and minor, small crystals of grimselite on a white quartz matrix..
Location: Gerstenegg - Sommerloch Tunnel, Grimsel, Hasli Tal, Bern, Schweiz (Switzerland)..
Scale: See Image.
© Paul M. Schumacher