Case Based MCQ . Aug 10, 2021Answer. (c) Calcined Gypsum. Let''s write the Chemical formula for all of them. Dolomite → (CaMg (CO 3 ) 2 ) A marble statue → Recrystallized carbonate minerals commonly calcite (CaCO 3 ) or dolomite (CaMg (CO 3 ) 2 ) Calcined Gypsum → CaSO 4 .2H 2 O; Sea shells → CaCO 3.