الكالسيت - digital-antsat.cz
الكالسيت أحجار كريمة: اشترى الكالسيت أحجار كريمة at بسعر Calcite is a carbonate mineral and is the most stable form of calcium carbonate. With a hardness of only 3 on the Mohs scale, it can only be used in jewelry that won't be subject to knocks or scratches, such as earrings and pendants.