Granite Pegmatite

  • Exhibition Text

    • This granite pegmatite illustrates the growth of extremely large crystals from a magma. It is composed of large feldspar (white) and biotite mica (silver-black) crystals in a groundmass of small crystals of quartz (gray), microcline, and albite (both white).

      Provided by the Feldspar Corporations, Spruce Pine, North Carolina

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  • For Educators

    • Topic: Earth Science

      Subtopic: Minerals and Resources

      Keywords: Feldspar, Mica, Albite, Quartz, Mineralogy, Pegmatites

      Audience: General