Calcium carbonate, or CaCO3, comprises more than 4% of the earth’s crust and is found throughout the world. Its most common natural forms are chalk, limestone, and marble. Calcium carbonate appears as white, odourless powder or colourless crystals. Calcium carbonate (CaCO3) is the most widely used filler in polymer formulations. As a filler, calcium carbonate allows cost reduction and improved mechanical properties. There are usages across various industries; plastics, paper, rubbers, paints, inks also in pharmaceutics, cosmetics, construction materials, and asphalts and as a nutritional supplement in animal foods among other industries.