According to Wikipedia It has been estimated that all the gold mined by the end of 2011 totaled 171,300 tonnes.[1] At a price of US$1,500 per troy ounce, reached on 12 April 2013, one tonne of gold has a value of approximately US$48.2 million. The total value of all gold ever mined would exceed US$8.2 trillion at that valuation, that's a little bit less now that called us at $1280 per ounce.