Final answer:
Gypsum is the nonmetal evaporite mineral used to construct interior walls, derived from the hydration of an anhydrite mineral.
Step-by-step explanation:
Gypsum is the nonmetal evaporite mineral used in the construction of interior walls in homes and other buildings. It arises from the hydration of anhydrite, an anhydrous calcium sulfate mineral (CaSO4), which forms in deeply buried evaporite deposits. Gypsum is inorganic, has a greater solubility in water and when in aqueous solution, it can conduct electricity due to ionic bonding.