What is calcium carbonate

Calcium carbonate is one of the most important non-metal mineral raw materials, whose exploitation may be a criterion of a country’s development level. The exceptional characteristics of calcium carbonate permit its wide application; from construction and chemical industry, sculpture, across fillers in paper production, plastic, paint and lacquer industry, to pharmacy. Calcium carbonate is the main ingredient of limestone rocks, chalk and marble. Although all three forms have similar chemical composition, they differ in thickness, hardness and whiteness. Carbonate rocks are subject to very small changes but are highly soluble in water, which contains carbon dioxide. Pureness, i.e. the share of calcium carbonate in the raw material is determined by the quality of the quarry and the production.

Natural calcite is usually honey-yellow to yellow-brown, while the massive varieties are milky-white. Pure calcite is rarely found in nature, and its characteristics are that it is colourless and transparent.

Raw materials processed at company White Rock in Siverić excel in extreme pureness and whiteness with a share of 90 to 99% of calcium carbonate.