Gold as a method of exchange

In the old days, a coin of some metal was easier to exchange than to implement a barter system. Of all the metals, gold was the logical choice.

• Metals like iron, lead, copper, and aluminium are prone to corrode over time.
• The "noble metals" like platinum or palladium are too rare to generate enough coins to circulate.
• Gold and silver. Gold is heavier than silver. Gold doesn't corrode and can be melted over a flame, making it an excellent choice to stamp as a coin.