Gold
material · 4500 BC · Stone Age
A precious metal for jewellery and coins.
Where it is used
- Coin — is material for. The first Lydian coins were made of electrum, an alloy of gold and silver.
- Dentures — is material for. Etruscan dentures were gold bands.
- Electroscope — is material for. With leaves of gold leaf.
- Wristwatch — is material for. The case is gold or silver.
- Glucose meter — is material for. The strip electrodes are gold or carbon.
- Rapid test — is material for. The label is gold nanoparticles.
- Fountain pen — is material for. Expensive nibs are gold: it does not corrode and flexes softly.