PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY
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.
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