Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of calc-spar is as below...

Calcite :: Calcite (n.) Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar..

Calc-spar :: Calc-spar (n.) Same as Calcite.

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