In 1982, the Royal Canadian Mint added two Gold Maple Leaf bullion coins with the consistency of .9999 pure gold to their production list. The 1/10th oz. and the 1/4 oz. Gold Maple Leaf bullion coins were added to the already popular 1 oz. gold maple leaf bullion coin.. The 1/2 oz. Gold Maple Leaf bullion coin wasn't introduced until 1986.