Dolostone, also known as dolomite rock, is a type of sedimentary rock primarily composed of the mineral dolomite. It forms when limestone undergoes a chemical process called dolomitization, where magnesium-rich water replaces some of the calcium in the limestone. This process often occurs in shallow marine environments, leading to the formation of this unique rock. Dolostone is typically light to dark gray in color and can have a crystalline texture. It is commonly used in construction and as a source of magnesium for various industrial applications. Additionally, dolostone can serve as a reservoir rock for oil and natural gas, making it significant in the energy sector.