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Gypsum Board Classified

Gypsum is an evaporite mineral most commonly found in layered sedimentary deposits in association with halite, anhydrite, sulfur, calcite, and dolomite.Gypsum caso 4.2h 2 o is very similar to anhydrite caso 4.The chemical difference is that gypsum contains two waters and anhydrite is without water.Gypsum is the most common sulfate mineral.