A goblet made up of three pieces of different agates decorated with enameled gold and crowned with an eagle's head. The vessel itself is considered a work of Antiquity, perhaps Hellenistic Greek, while the other parts were made in the seventeenth century. According to old photographs, it originally had a handle shaped like a winged dragon on the opposite side from the eagle. This was stolen from the Prado Museum in 1918.

This work was part of the inheritance received by King Felipe V (1683-1746) upon the death of his father, the Grand Dauphin, in 1712.