State by State


  • Specimen Number


  • Description

    Broken slab of massive pink quartzite with white specks of alteration. Verified by state survey staff as pink quartzite.

  • Classification

    Metamorphic. Quartzite. Pink.

  • Location & Occurrence

    Survey staff suggests Baraboo Quartzite, which is well exposed at Devils Lake State Park, a common tourist destination. .

  • Geological Age

    Proterozoic. 1.6 Ga for the Baraboo Range.

  • Geoheritage

    A beautiful stone widely known as glacial erratics.

  • Links

    Link to State Geological Map from USGS.  Link to Wisconsin Geological and Natural History Survey.

  • Other

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Specimen stone for Wisconsin.
Closeup of Wisconsin stone. Outline Map of Wisconsin. Geo Map of Wisconsin.