Description
Rough, uncut extra large size thunder egg. Pieces vary in size, but approximately 12 x 12 x 12cm (4.7 x 4.7 x 4.7″). Sold individually. Also large size sold in bulk 10lb packages here.
They are formed in volcanic ash layers. The inside may be solid or hollow, and usually has chalcedony, agate and/or jasper that formed when the minerals and gases cooled.
