actual: 2.1 cm (13/16 in.)
Copper alloy
7th-8th centuryAvarGold
2nd century BCEGreekSilver weave
18th-19th centuryUnidentified cultureBanded agate
1st century BCE-2nd century CERomanGlass with wire
19th centuryBritishMetal
20th centuryGermanBronze
10th-7th century BCEIranianBlack-surfaced earthenware with inlays of aqua and white glass
5th-3rd century BCEChineseCopper alloy
1st-2nd millennium CEByzantineCopper alloy
9th-8th century BCEItalicCopper alloy
6th century BCEEuropean