Copper is an elemental metal, reddish brown in colour and very soft and has been mined for over 5000 years. Its atomic symbol Cu comes from the Latin, cuprum meaning from Cyprus.
While in ancient times copper was used for some tools, by the medieval period it was primarily used for currency and jewelry. A lot of medieval gold was high in copper content, giving it a little more cheapness and affordability, along with a signature redder colour.
Tin can be added to copper to strengthen it and make the alloy bronze.