In which country did they first start minting a coin from an alloy of gold and silver?

In the 7th century BC, in the empire of Lydia, the government first began to mint coins, which became a measure of the value of various goods. The coin itself was made from a natural alloy of gold and silver. Earlier, before the advent of coins, there was barter (exchange of goods). Finding a person with whom it was profitable to change the occupation is quite difficult. Therefore, the coin was a very progressive phenomenon of this time.