What is Gypsum?
An important construction material that has been used for thousands of years
Article by: Hobart M. King, Ph.D., RPG https://geology.com/authors/hobart-king/

Uses of Gypsum
Gypsum uses include: manufacture of wallboard, cement, plaster of Paris, soil conditioning, a hardening retarder in portland cement. Varieties of gypsum known as “satin spar” and “alabaster” are used for a variety of ornamental purposes; however, their low hardness limits their durability.