The Canadian Gold Maple Leaf is a gold bullion coin that is issued annually by the Government of the Dominion of Canada. It is produced by the Royal Canadian Mint. The Gold Maple Leaf is legal tender. The face value is 50 Canadian dollars. The market value of the metal varies, depending on the spot price of gold. Having a .9999 millesimal fineness (24 carats), in some cases .99999, the coin is among the purest official bullion coins worldwide. The standard version has a weight of 1 troy ounce (31.10 grammes). Other sizes and denominations include 1 gram, ($0.50), ($1), ($5), ($10), and ($20). The Gold Maple Leaf’s obverse and reverse display, respectively, the profile of Elizabeth II and the Canadian Maple Leaf. In 2015, new security features were introduced: radial lines and a micro-engraved laser mark. On 3 May 2007, the Royal Canadian Mint unveiled a Gold Maple Leaf coin with a nominal face value of $1 million and a metal value of over $2 million. It measures in diameter by thick and has a mass of , with a purity of 99.999%. The artist is Stanley Witten.