The oval sardonyx depicting the shade of Hector appearing to Aeneas in his sleep (the night which closed the fate of Troy, to warn him of the danger, and to urge his removing to a place of safety the Lared and the objects sacred to the worship of Vesta).

Signed in Greek Diokleos

Dimensions: with the frame 5.7 x 5.1 cm, the intaglio 3.7 x 3.2 cm

In a contemporary black enamel yellow gold carved setting marked with city of Rome papal hallmarks and maker's mark Luigi Mascelli (1804-1825)