What is calcite classified as?

Calcite is classified as a mineral composed of calcium carbonate (CaCO3). This classification is based on its specific chemical composition and crystalline structure. Calcite naturally occurs in a variety of forms and is an essential component of sedimentary rocks such as limestone and chalk. It is characterized by its rhombohedral crystal shape, high luster, and distinctive reaction with dilute hydrochloric acid, which distinguishes it from other minerals. Recognizing calcite in this way is important for understanding geological processes and the formation of various rock types. The other classifications mentioned do not accurately describe calcite itself. For example, while calcite can be a component of sedimentary rocks, it is not a form of sedimentary rock in its pure mineral state. Similarly, calcite is neither an igneous nor a metamorphic rock, as these classifications refer to different processes of formation unrelated to calcite’s nature as a mineral.