| GYPSUM DESERT ROSE - Gypsum (Hydrated calcium sulfate) is a type of sedimentary rock called an evaporite. It is formed at the bottom of shallow bodies of saltwater containing calcium and sulfur. As the saltwater evaporates, dissolved calcium and sulfur in the water become concentrated and precipitate as the mineral gypsum. Gypsum crystals occur in rose shaped aggregates often incorporating grains of sand. These gypsum “desert roses” grow by replacing carbonate sediment in soil overlying gypsum deposits. When gypsum is heated and ground to a fine powder it is known as Plaster of Paris, used in construction. Plaster of Paris was first produced in the Montmartre quarries of Parris. GYPSUM Insight Assurance Body Tissue, Reproductive |