Tortoise shell?
19th centuryBritishCopper alloy
8th-2nd century BCEGreekGold
2nd century BCEGreekCopper alloy
7th-8th centuryAvarCopper alloy
8th-7th century BCEItalicCopper alloy
7th-8th centuryAvarBronze
10th-8th century BCEIranianGold and enamel
19th centuryFrenchGold
EtruscanCarnelian set in gold
RomanBronze
9th century BCEItalic