Discovery of Metals

Stone Age

Gold

6000 BC

Copper

4200 BC

Silver

4000 BC

Lead

3500 BC

Copper Age

Arsenic

2500 BC

Bronze Age

Tin

1750 BC

Iron (smelted)

1500 BC

Iron Age

Mercury

750 BC

Modern Age

Zinc

1400

Cobalt

1735

Platinum

1735

Nickel

1751

Tungsten

1783

Uranium

1789

Titanium

1791

Chromium

1797

Potassium

1807

Sodium

1807

Barium

1808

Boron

1808

Calcium

1808

Magnesium

1808

Strontium

1808

Silicon

1823

Aluminium

1827

Caesium

1860

Rubidium

1860