Gypsum mining. Worker using a mining machine to extract gypsum ore from the mine. Gypsum is a form of hydrated calcium sulphate. It is a common mineral formed by evaporation of salt-rich waters. It is used in a variety of ways: in cement,plaster casts and as an ingredient to add calcium to foods and drinks | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Public Health England |
Taille de l’image : | 3643 px × 2420 px |
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Property Release : | Non requis |
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