Barite is the most common mineral of barium, and its composition is barium sulfate.

Barite is used as a functional filler in paint, rubber and plastic industries to improve the hardness, wear resistance and aging resistance of rubber and plastics. Various barium compounds are widely used in reagents, catalysts, fire protection, coagulants, insecticides, phosphors, fluorescent lamps, and medical shields such as X-ray laboratories.