Claim: Mikhail Prokhorov is the former chairman of Russia's largest gold producer.
Evidence: He is the former chairman of Polyus Gold , Russia 's largest gold producer , and the former President of Onexim Group.
Polyus Gold International is the largest gold producer in Russia and one of the top 10 gold miners globally by ounces produced -LRB- 1.5 million ounces of gold production in 2011 -RRB-.