The talented Mr Erdogan- Asia Times

The United States is shocked - shocked - to discover that Turkey, a notional American ally, has done more to help Iran skirt sanctions than any other country. Turkey's precious metals exports, almost all of which went directly or indirectly to Iran, quintupled this year to US$14.3 billion. Iran uses the precious metals to skirt restrictions on its access to the banking system.

http://www.atimes.com/atimes/Middle_East/NL04Ak01.html