Ultra high quality real carboniferous fossil fern Neuropteris ovata . The leaves are not flat, well tridimensional, natural color, veins, midrib and stipule are preserved. The fossil is between 309-302 million years old. Matrix is 6,3 x 5,3 cm Neuropteris ovata Middle Pennsylvanian (Desmoinesian); Skiatook Group, Coffeyville Formation; Tulsa County, Oklahoma;