Born of supernovas, precious metals such as silver were present in the cloud of galactic dust that coalesced to create our solar system. A supernova occurs during the final stages of a star’s life cycle and culminates in an explosion of titanic proportions. Rare and brilliant, diamonds have been a source of intense fascination for centuries. After forming billions of years ago they remained deep in the Earth’s mantle before being catapulted closer to the surface by rapidly ascending streams of molten volcanic rock. The unique and naturally coloured golden diamond featured in this coin, aged at 1.6 billion years, has been extracted from the Argyle Diamond Mine in Western Australia’s spectacular Kimberley region.