Kalsitt
Kalsitt, or calcite, is a widely distributed carbonate mineral with the chemical formula CaCO3. It is the most stable polymorph of calcium carbonate at Earth's surface and occurs in a diverse range of geological environments. Calcite forms in sedimentary rocks such as limestone and marble, in hydrothermal veins, and as precipitates in caves where it creates stalactites and stalagmites. It also appears as large transparent crystals in geodes and some metamorphic rocks.
Crystal structure and properties: Calcite crystallizes in the trigonal crystal system and commonly forms rhombohedra and
Identification: Calcite effervesces in dilute hydrochloric acid due to the release of carbon dioxide, a classic
Uses and significance: Calcite is the primary source of industrial lime and cement and is widely used
Names and varieties: The term kalsitt is used in several languages for calcite. Common varieties include Iceland