WORLD CIVILIZATION

Detailed explanation-1: -The Lydians were said to be the originators of gold and silver coins.

Detailed explanation-2: -The Lydian stater was composed of electrum, a naturally-occurring gold-silver alloy; though the coins are often reported to be struck from this naturally-occurring alloy, they were actually made from a specific and rather consistent mix of approximately 55% gold, 45% silver, and a small balance of copper.

Detailed explanation-3: -The Lydian motives The advantage of coining electrum becomes apparent. The coins provided more security about the contents than the unadulterated pieces of the metal did. They offered an insurance premium.