Iranian financial institutions have been hit by sanctions imposed by the United States and the European Union in an effort to force Tehran to halt its nuclear programme.
Significant difficulties in making dollar payments to Iranian banks have forced Iran's trading partners to look for alternative ways to settle transactions, including direct barter deals.
"In its trade transactions with other countries, Iran does not limit itself to the U.S. dollar, and the country can pay using its own currency," central bank governor Mahmoud Bahmani was quoted as saying. "If a country should so choose, it can pay in gold and we would accept that without any reservation."
The sanctions include a phased ban on importing oil from Iran, which EU member states are to implement by July.