http://itunes.apple.com/us/app/us-gold-bureau/id469274397?mt=8 - There are many gold sources like the US Gold Bureau from which you can buy gold. Before doing so, however, take the time to browse the information given on the United States Gold Bureau website to learn more about what the U.S. Gold Bureau has to offer. The information you gather can contribute a lot when purchasing from the US Gold Bureau or other gold investors.