Anhydrite specimen. Anhydrite (calcium sulphate) is a mineral that forms an orthorhombic crystal system. This sample is from the Simplon tunnel throug

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Anhydrite specimen. Anhydrite (calcium sulphate) is a mineral that forms an orthorhombic crystal system. This sample is from the Simplon tunnel through the Alps which links Switzerland to Italy.

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Size: 4690px × 3726px
Photo credit: © NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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