This is a fossil horsetail Neocalamites merianii. The fossil comes from the lower Keuper of Neuenstein in Germany. The plant is quite large and very well preserved. The original matrix measures approximately 36 x 19 x 2 cm. The stone is unbroken and contains other interesting plant parts on the front and back. Beautiful horsetail from the Triassic era! No additions, no color - all original!