calcite

noun (n)

1. a common mineral consisting of crystallized calcium carbonate; a major constituent of limestone (noun.substance)

   Sumber: wordnet30

2. 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. (noun)

   Sumber: webster1913