c. 400 CE-1900
actual: 3.7 cm (1 7/16 in.)
Marble
1st-2nd century CERomanMarble
2nd century CERomanGreek island marble
2nd century CERomanBone
RomanPentelic marble
3rd century CERomanParian marble
1st-2nd century CERomanMarble
2nd-3rd century CERomanMarble
RomanMarble
2nd century CERomanLapis lazuli (?)
1st-3rd century CERomanPentelic marble with modern restorations
2nd century CERomanMarble
1st-2nd century CERoman