Now, you can reserve your own copy of the 2013 $50 Buffalo Gold Buffalo Tribute Proof, clad in 14 mg of pure gold. The $50 Gold Buffalo Coin is the purest gold coin ever made by the U.S. government, and was the first U.S. coin ever struck using .9999 Pure 24 KT Gold. Its design is based on the famous Buffalo nickel minted from 1913 to 1938. Wildly popular with investors and collectors, the U.S. government had to stop production because of a shortage of specially made gold blanks. It's no wonder the price of the last edition is going through the roof. Save up to 50% on shipping when you order multiple proofs.