This stunning 1 oz proof silver coin features a beautiful painting of Mona Lisa by Leonardo da Vinci. The coin is minted in Niue and is ungraded. It has a fineness of 0.999 and a total precious metal content of 31.1 g. The coin is not certified, but it comes with a certification number defined in the certificates. This collectible coin is a must-have for any art lover or coin collector. The striking proof finish adds to the beauty of the coin, making it a perfect addition to any collection. The California Prop 65 warning applies, but rest assured, it is not harmful to humans and the environment.