The 8,133.5 Tones of Gold Reserves have an official book value worth $11,041,059,958 ($11 Billion) as of 1/11/2013 and are shown below.
Year 1933, in the Pillar of Human Civilization & Capitalism-- the United States of America, gold possession was criminalized. Shortly after confiscating the Gold, the US devalued gold from $20.67/oz to $35/oz, by so devaluing the US dollar by 70% overnight. The US Dollar 'Federal Reserve Note' still said "Redeemable in Gold", while doing so got you arrested. USA was on the Gold Standard until 1971. Gold possession remained illegal until 1975.
The arguably real intention of criminalizing Gold was because the Federal Reserve printed too many dollars, backed by a limited amount of Gold. People knew Gold was worth more than the $20.67/oz that US Government was 'redeeming' (selling) Gold at.