19th century
Iron
ChineseLeaded copper
3rd millennium BCEIranianIron
JapaneseMottled reddish brown nephrite; the stone of Central Asian origin, probably from Khotan
11th-10th century BCEChineseLead
Lead
GreekLead
GreekCopper
15th-13th century BCEHittiteIron
JapaneseBronze
ChineseSteel
19th centuryTurkishRock crystal
17th centuryIndian