actual: 1.9 cm (3/4 in.)
Leaded bronze
2nd-3rd century CERomanCopper alloy
1st-3rd century CERomanCopper alloy
1st-5th century CERomanCarnelian gem in gold setting
4th-1st century BCERomanCopper alloy
2nd-3rd century CERomanCopper alloy
2nd-6th centuryRomanBrass
1st-2nd century CERomanBronze
1st century BCE-1st century CERomanCopper alloy
2nd-4th century CERomanBrass
4th century CERoman