Polyhalite is a potassium magnesium calcium sulfate mineral with iron oxide inclusions. This sample comes from Cardona, Barcelona, Catalonia, Spain.

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Photo credit: © José María Barres Manuel / Alamy / Afripics
License: Royalty Free
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Keywords: barcelona, calcium, cardona, catalonia, close, evaporite, horizontal, iron, magnesium, mineral, oxide, polyhalite, potassium, red, sample, spain, sulfate