Calcite, also known as calcium carbonate (CaCO3), is a coarse crystalline marble with a specific gravity ranging from 2.6 to 2.8 and a hardness of 3 Mohs that is easily breakable and transparent. When it is finely ground to a micronized size, calcite becomes a vital raw material in various industries, including paint, paper, plastic (e.g., PVC pipes, profiles, panels), cable, construction (e.g., plaster, putty, coarse filling, gypsum plaster manufacturing, adhesives), food, ceramics, and pharmaceutical sectors. Due to its affordable price, whitening properties, and unique characteristics, calcite is one of the most essential and frequently used raw materials.

In the paint industry, calcite plays a crucial role as it is often utilized as a supporting raw material. Specifically, 25-30% of calcite is frequently incorporated into water-based paint systems utilized in both interior and exterior coatings of construction paints. This addition not only reduces the consumption of titanium dioxide but also cuts costs. As calcite possesses properties similar to those of highly-priced pigments like titanium dioxide, its widespread use across numerous industries is highly economical. Besides, many countries also use calcite to enrich soil quality and reduce the acidity of polluted lakes.