Sthenarocalymene celerbra Raymond.
Small piece of Dolomitic Limestone with a perfect 3D Calymene . The surface of the trilobite looks lie it has been sprinkled with a fine coating of sugar. Really attractive.
Silurian, Joliet Dolomite.
Lemont Quarry, Thornton, Illinois, USA.
Trilobite : 3 cm long.
