... 3. good service 4. free sample available Barite PowderBarite, barytes barium or heavy spar, a white, yellow, blue, red, or colorless mineral ... insoluble under ordinary conditions in all the usual chemical reagents. Barite is used as a commercial source of barium and many ... sealing oil wells during drilling. Prime white, a bleached barite, is used as a pigment in white paint but is not as satisfactory ...