Combining Australia’s national gemstone, with the Chinese Lunar Calendar, AND precious metal, The Perth Mint’s Black Opal lunar series is extra special. One of the most popular collector coins that the Perth Mint produces each year, the Black Opal Lunar coin is, as per usual, again headed for a sell-out in 2021! A tremendously popular coin from a tremendously popular series, each black opal Lunar Ox is struck from 1oz of 99.99% pure silver to perfect proof quality. At its core, each coin features a piece of Australian Black Opal carefully crafted in the shape of a mighty Ox! Mintage just 5,000.