The death mask of Tutankhamun was made primarily from gold.
The mask was created for the burial of Tutankhamun, who ruled Egypt during the Eighteenth Dynasty from about 1332 to 1323 BC. It represents the king in an idealized form of Osiris, god of the afterlife, and was placed over his mummy inside the innermost coffin. Its gold surface symbolized the imperishable body of the gods and the eternal nature of kingship.
The mask is about 54 centimetres tall and weighs more than 10 kilograms. It is decorated with lapis lazuli, carnelian, quartz, obsidian, turquoise, glass, and other materials. The striped nemes headdress is topped by a cobra and vulture, symbols of the pharaoh’s rule over Lower and Upper Egypt.
Gold is the canonical answer, although the mask is not made only of gold: its inlays and coloured glass provide much of its distinctive detail. It was found in Tutankhamun’s tomb after Howard Carter’s discovery in 1922 and opened in 1925.