Paleosmunda Petrified Wood Stone Sphere Marble

This is small but lovely and very RARE Petrified Wood sphere is just 1 inch or 25 mm in diameter.

Paleosmunda is a primitive member of the Osmundoidae from the Permian Period (approximately 290 million years old) found in Central Queensland, Australia.

It is a fern, species: Paleosmunda williansoni.

From the Paleozoic Era, this gemstone is the fossilized stone of Osmunda fern leaves and stems. The stone formed when a fern died and was buried by sediments. Minerals in the groundwater then permeated the fern, replacing the original organic matter and turning it to stone.