Gypsum crystals. Gypsum, hydrated calcium sulphate (formula: ), is a major rock-forming mineral that is mostly created by precipitation from

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Gypsum crystals. Gypsum, hydrated calcium sulphate (formula: ), is a major rock-forming mineral that is mostly created by precipitation from saline waters. The colourless form is called selenite. Another form, alabaster, is used as an ornamental carving stone. Gypsum is used extensively in plaster for the building trade. This specimen is from Mexico.

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Size: 3307px × 4257px
Photo credit: © MARTIN LAND/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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