(from the article `gypsum`) ...in portland cement. About three-fourths of the total production is calcined for use as plaster of paris and as building materials in plaster, ... Gypsum plasters are used for plastering, the manufacture of plaster boards and slabs, and in one form of floor-surfacing material. These gypsum ... [2 related...
Gypsum formulated to be used with the addition of sand and water for base-coat plaster. 
is basically, calcium sulphate, the raw material for fine plaster, used for finishing the interior surfaces (walls and ceilings) of a building, which sets rapidly on addition of water. Most gypsum is mined, but it is also available as an industrial by-product. Gypsum plaster is not suitable ...
Gypsum formulated to be used with the addition of sand and water for base-coat plaster.
See plaster. 
Gypsum formulated to be used with the addition of sand and water for base-coat plaster.
Gypsum formulated to be used with the addition of sand and water for base-coat plaster.
plaster made primarily of gypsum.