+Calcium carbonate is a common chemical compound, the primary component of [Limestone](/wiki/limestone) and [Marble](/wiki/marble). It is the building block for the shells of marine creatures, eggshells, and pearls, also widely used as an antacid and in [Construction](/wiki/construction).
+## See also
+- [Mineral](/wiki/mineral)
+- [Rock](/wiki/rock)
+- [Antacid](/wiki/antacid)
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