The Messinian Salinity Crisis
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Gypsum

Chemical Formula- CaSO4*2H2O
Moh's Scale- 1.5 - 2.0
Specific Gravity- 2.31 - 2.33
Molecular Weight- 172.17
Color- Usually colorless or ray, but can also be found in shades of yellow, brown or red.
Streak- White
Transparency-Transparent to translucent crystals.
Cleavage- 2 good at 66 and 114 degrees.

  • Gypsum's Uses- 

    • Cement

    • Toothpaste

    • Blackboard Chalk

    • Toothpaste
       

  • Where It Occurs In Nature-

    • Mexico

    • Italy

    • England

    • Ireland

    • New Mexico

    • Utah

    • Colorado

    • Nevada

    • Germany

    • Arizona

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