-
6000 BCE
Gold
Found uncombined in nature -
Period: 6000 BCE to 3000 BCE
Stone Age
-
4200 BCE
Copper
Extracted in Kiln -
3500 BCE
Lead
Extracted in Stone Furnace -
Period: 3000 BCE to 2500 BCE
Copper Age
-
2500 BCE
Bronze
Alloy - Made from Copper/Tin -
Period: 2500 BCE to 1000 BCE
Bronze Age
-
1500 BCE
Iron
Extracted by Calcination
Iron Ore Smelted -
1400 BCE
Steel
Smelted by Iron Ore and Other Metals -
Period: 1000 BCE to 1 CE
Iron Age
-
Period: 1 CE to
Modern Age
-
Titanium
Extracted by Metal Displacement with Sodium/Magnesium -
Aluminum
Bayer Process and Electrolysis in Cryolite Solution