Glauberite is a mineral composed of sodium sulfate and calcium sulfate, with the chemical formula Na2Ca(SO4)2. It typically forms in evaporite deposits, where water evaporates and leaves behind various minerals. Glauberite is often found in sedimentary rocks and can appear in colors ranging from white to gray or yellow. This mineral is named after the German chemist Johann Rudolf Glauber, who discovered sodium sulfate in the 17th century. Glauberite is of interest in various industries, including the production of glass and fertilizers, due to its sulfate content and solubility in water.