gypsum

it is a soft sulfate mineral composed of calcium sulfate dehydrate, with the chemical formula CaSO4·2H2O. It is widely mined and is used as a fertilizer, and as the main constituent in many forms of plaster, blackboard chalk and wallboard. Other uses: Adding hardness to water used for brewing Plaster Water purification In creams, shampoo PUBLTD CO. is exporter of this product to all around the world