Granite pegmatite

  • Exhibition Text

    • This rock formed deep in the crust, near the top of a crystallizing magma chamber.  It is composed of the minerals quartz (gray), orthoclase (pink), albite (white), and mica (dark and platy). The larger crystals grew more slowly than the smaller crystals.

      AMNH collection

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  • For Educators

    • Topic: Earth Science

      Subtopic: Earth Formation/Evolution

      Keywords: Minerals, Pegmatites, Physical geology

      Audience: General