Kieserites
Kieserites are minerals that belong to the sulfate mineral group and are composed of magnesium sulfate monohydrate. They typically form as colorless to white crystals and are commonly found in evaporite deposits. Kieserites have a hardness of 3.5 on the Mohs scale and a vitreous luster. These minerals are often used in fertilizers and as a source of magnesium in various industrial applications.