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gypsumgypsum-sulfategypsum-sulfate2

Gypsum (Sulfate) 

CaSO2*2H2O

Hardness: 2.0
Specific Gravity: 2.32

Characteristics: White, gray, or colorless; vitreous or silky luster; transparent to translucent; perfect basal cleavage; often form in elongated massses or rosettes; twinning and crystal intergrowths are common; rarely contains significant impurities.

Found in evaporites; hydrothermal deposits.

Some uses of gypsum include industrial or building plaster; in wallboard; in cement manufacture; and agriculture.

(Primary text: Perkins, D. 2002. Mineralogy. Prentice Hall.)

 
 

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