Lithophysa (Thunderegg) Photos
Cochise College
Photos of Rocks      Igneous Rocks
Virtual Geology Museum       Hall of Rocks
Geology Home Page
Roger Weller, geology instructor

lithophysa (thunderegg), polished-B
In this thunderegg, the internal cavity was first lined with agate and then filled
with common white opal.

Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.