Calcite vs. Aragonite

Calcitenoun

(geology) a very widely distributed crystalline form of calcium carbonate, CaCO3, found as limestone, chalk and marble

Calcitenoun

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.

Calcitenoun

a common mineral consisting of crystallized calcium carbonate; a major constituent of limestone

Calcite

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 3 as .

Aragonitenoun

(mineral) An evaporite consisting of anhydrous calcium carbonate with the chemical formula CaCO3; it is dimorphous with calcite.

Aragonitenoun

A mineral identical in composition with calcite or carbonate of lime, but differing from it in its crystalline form and some of its physical characters.

Aragonitenoun

a mineral form of crystalline calcium carbonate; dimorphic with calcite

Aragonite

Aragonite is a carbonate mineral, one of the three most common naturally occurring crystal forms of calcium carbonate, CaCO3 (the other forms being the minerals calcite and vaterite). It is formed by biological and physical processes, including precipitation from marine and freshwater environments.