(Original plaster model) next pervious Overview Mask of Neptune, the ancient Roman water God (also identified to the Greeks as Poseidon, God of the sea). Modelled in clay, carved and refined in plaster. This Neptune sculpture has been cast in bronze. Dimensions (H,W,D) - inches : (12.5, 8.5, 6)Materials : Cast in bronzeStock Reference Number : SC2Copyright : Hurley Marble. All Rights Reserved.