Thunderegg, Photo by Jeff Scovil

Rice Museum of Rocks and Minerals
Hillsboro, United States

Opalized thunder egg found in Opal Butte, Heppner, Morrow County, Oregon, U.S.A. Part of the Rice Museum Collection. Photo by Jeff Scovil. Thundereggs are the state rock of Oregon.

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Title: Thunderegg, Photo by Jeff Scovil

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