Stock Photo - Red gypsum with hematite quartz crystals (silicate). Gypsum is a mineral composed of calcium sulfate dihydrate. This sample comes from Sierra de Albarracin, Teruel, Aragon, Spain.

Stock Photo: Red gypsum with hematite quartz crystals (silicate). Gypsum is a mineral composed of calcium sulfate dihydrate. This sample comes from Sierra de Albarracin.

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