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aragonite vs. calcite
[ uh-rag-uh-nahyt, ar-uh-guh- ]
noun
- a mineral, orthorhombic calcium carbonate, CaCO3, chemically identical with calcite but differing in crystallization and in having a higher specific gravity and less marked cleavage.
[ kal-sahyt ]
noun
- one of the commonest minerals, calcium carbonate, CaCO3, found in a great variety of crystalline forms: a major constituent of limestone, marble, and chalk; calc-spar.