Canadian Gold Maple Leaf Canadian Gold Maple Leaf coins are the official gold bullion coin of Canada and are produced by the Royal Canadian Mint. The most popular size is 1 troy oz and they contain .9999 pure gold. They are guaranteed by the Canadian government as to their weight and purity of gold content. It is one of the purest gold coins of regular issue in the world, with a gold content of .9999 purity (24 carats). It contains no base metals at all—only pure gold. It was first produced in 1979, at which time the only bullion coin was the Krugerrand, which was not widely available because of an economic boycott of apartheid-era South Africa.