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- Calcium carbonate in the form of marble is used as building material.
- It is used in the manufacture of quicklime (CaO) which is the major ingredient of cement.
- A mixture of CaCO3 and MgCO3 is used as flux in the extraction of metals from their ores.
- It is required for the manufacture of high-quality paper.
- It is an important ingredient in toothpaste, chewing gum, dietary supplements of calcium and filler in cosmetics.
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