20th century
Steel
17th-18th centuryIndianArsenical bronze
3rd millennium BCEIranianBronze
10th-8th century BCEIranianCopper alloy
2nd millennium BCEEuropeanMetal
18th centuryIndianBronze
ChineseLead
GreekLead
3rd century BCEEgyptianCopper alloy
9th-7th century BCEIrishLeaded bronze
7th-6th century BCEGreekLead or Pewter