An early 19th century Italian micromosaic plaque with a view of Vesta at Tivoli, mounted on a tortoiseshell box and set with gold mounts.
Dimensions: The box measures 8.4 cm diameter by 2.2 cm high and the plaque has a diameter of 5.6 cm.
See pages 68, 76 & 83 of Micromosiacs by Jeanette Hanisee Gabriel.