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Mineral stone calcite. A white or colorless mineral consisting of calcium carbonate. It is a major constituent of sedimentary rocks such as limestone, marble, chalk. Stock Photo | Adobe Stock
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Rare and Hard to Find Art Supplies | Calcite (Chalk)—Types, History and Use in Oil Painting | Pigments, Oil Paint, Watercolors, Cold Wax
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New research reveals fresh insights into the role of karst in the Chalk aquifer - British Geological Survey
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