The Perth Mint of Australia used Twitter to announce a 1 tonne Gold Kangaroo coin.
The 1 tonne weight is equal to 1,000 kilograms or 32,150.7466 troy ounces.
Based on the current market price of gold, the coin has a value of more than US $55 million based on the gold content alone.
The announcement of the 1 tonne gold coin and a picture of the coin were posted in the tweet, which called it “the world’s largest gold coin.”
The front of the coin features Ian Rank Broadley portrait of Queen Elizabeth II and carries the face value of AUD $1,000,000.
The reverse design features the classic kangaroo design by Dr. Stuart Devlin AO CMG, goldsmith and jeweller to Queen Elizabeth II.
The inscriptions include the “2012″ date and “1 Tonne 9999 Gold”.
Previous holders of the title of world’s largest gold coin include a 31 kilogram Gold Philharmonic coin struck by the Austrian Mint in 2004.
This was followed by a 100 kilogram Gold Maple coin struck by the Royal Canadian Mint in 2007.