Ivory
RomanCopper alloy
1st-5th century CERomanBone
4th-5th century CERomanBronze
1st-2nd millennium CERomanGray stone
4th-3rd millennium BCEChineseSilver
19th centuryAmericanSilver
18th centuryIrishCopper alloy and iron
1st millennium BCEGreekCopper alloy
1st-4th century CEGreekCast bronze with gray-green patina
14th-11th century BCEChineseMother of pearl ring with brass bell
20th centuryUnidentified culture