In part as a marketing exercise, The Royal Canadian Mint has produced a $1 million face value coin containing 100kg of .99999 pure gold.
With gold currently trading at $660 per ounce and each kilogram containing 31.1 ounces, the actual cost of the gold in the coin is worth just over $2.5 million USD!
It seems to be part of a marketing exercise to promote its .99999 pure gold Maple Leaf bullion coin. Current Maple Leaf gold coins are .9999 pure. In contrast, South African Krugerrands, while containing a full ounce of fine gold, are only .9167 percent pure with the balance made up with copper, so they actually weigh more than an ounce.