anhydrite
/ænˈhaɪdraɪt/
noun
- A white or gray mineral made of calcium sulfate that does not contain water, often found in evaporite deposits.
- The geologist identified the rock as anhydrite because it lacked the water found in gypsum.
- Anhydrite is commonly found in salt mines and dried-up lake beds.
- Anhydrite is used in the production of cement and as a soil conditioner.