The Dynamic Earth View Multimedia Version

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TITLE: All Rocks Contain Water


Rocks are solid, natural aggregates of minerals, with glass also present in many volcanic types. Minerals combine in different ways to make rocks. Minerals are the words in Earth's history book: In each rock, they tell a different story.

  • Three Rocks and Their Minerals
  • Rock Snapshots
  • Time Detectives
  • All Rocks Contain Water
  • [Photo: Lodestone with paper clips clinging to it.]

    Zap! Lightning created this lodestone—a natural, permanent magnet. Steel paper clips cling better to areas where the strongest current traveled.

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