200 BCE - 100 BCE
0.5 cm (3/16 in.)
Brass and glass
1st-3rd century CERomanCopper alloy
8th century BCEGreekCopper alloy
7th-8th centuryAvarCopper alloy
8th-6th century BCEGreekLeaded brass, lead-tin alloy inlays
9th centuryAnglo-SaxonCopper alloy
2nd-3rd century CERomanBronze
8th century BCEGreekAgate
3rd millennium BCESumerianLeaded bronze
2nd-3rd century CERomanSardonyx set in gold
16th-18th centuryItalian