The plural of lithophysa is lithophysae.
last edited: 3/2/11 number of photos: 9
Lithophysae can be either large hollow, bubble like structures
or small spherulites with radial structures that are found in obsidians
If mostly hollow, the lithophysae are known as geodes; if filled in with
agate material, they are known as thundereggs.
Link to Eibonvale Thunderegg Gallery
lithophysa, cut: A
lithophysae, polished: A B C D E
lithophysa with opal:
lithophysae in rhyolite: A
Photos are copyright free for non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.