Coin
device · 600 BC · Ancient world
A metal token of value bearing a stamped image.
What it is made of
- Coin obverse and reverse faces — has part. Front and back with pictures.
- Coin edge — has part. The edge of the coin.
- Blank coin disc — has part. A metal blank.
Principles and materials it uses
- Gold — is made of. The first Lydian coins were made of electrum, an alloy of gold and silver.
- Coining (die stamping) — uses. The image is applied with a blow of a die.
- Silver — is made of. Silver coins.
History: what it evolved from and what it influenced
- Paper money — evolved into. A replacement for metal money.