The Dynamic Earth View Multimedia Version

Main Menu >  Gems and Minerals >  Crystal Growth >  Different Environments
TITLE: Different Environments

[Photo: Different Forms of Gypsum]

[Photo: Different Forms of Gypsum]All these crystals are the same mineral: gypsum. They all have the same chemical composition and atomic arrangement. Why do they look so different? Impurities—or even slight changes in the concentration of the solution feeding the gypsum's growth—can trigger drastic differences in form.

Bottom Navigation Bar


Smithsonian National Museum of Natural History Department of Mineral Sciences website Credits