Chalcedony geode (114930)

Geodes are nodules with a hollow cavity filled with crystals. They are a fascinating geological wonder. The crystals can be microscopic or can be quite large. When it occurs in crystals not visible to the human eye, it is known as a Chalcedony Geode (Chalcedony). Most geodes are surrounded by a banded layer of Agate around the hollow area. The Agate layer can be quite thick, and in certain geodes, it completely fills the hollow cavity. This unique geode measures 4" high x 5.25" wide