Zar Kuh Mining Company
In 2005, the Age noted that "Rio Tinto says it has found a "significant" gold resource in Iran that could increase the Islamic Republic's output of the precious metal fivefold."  Also see
"Rio Tinto has a 70 per cent shareholding in the Zar Kuh Mining Company, which has been exploring Sari Gunay. The firm is 30 per cent held by an Iranian exploration firm."