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many common minerals. calcium carbonate is one of the most common compounds of calcium, found widely as the primary component of limestone. for millennia, humans have used limestone directly as a building material, and additionally to produce lime, which itself was widely used in building materials
such as mortar. as a chemical agent, lime found historic uses in arenas such as agriculture, tanning, and glassmaking . other widely known and used calcium minerals include marble, a type of rock resulting from the metamorphosis of limestone, and gypsum, which is composed of calcium sulfate . though...
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