2nd century CE
actual: 6.2 cm, 0.04 cm (2 7/16 in.)
Leaded bronze
1st-3rd century CERomanCrystalline marble from Asia Minor
1st millennium BCE-1st millenium CERomanGreek island marble
1st-2nd century CERomanGold
2nd-3rd century CERomanLeaded bronze (lead-filled in antiquity)
2nd-3rd century CERomanGiallo Antico marble from North Africa
2nd century CERomanMixed copper alloy
2nd-3rd century CERomanMarble from mainland Greece, Pentelic (?)
2nd century CERomanLapis lazuli (?)
1st-3rd century CERomanLuna marble
2nd century CERomanLeaded bronze
2nd-3rd century CERomanCrystalline Greek marble, perhaps from Naxos
1st century BCE-2nd century CERoman