Argyle diamond coin trilogy unveiled at The Perth Mint
7 June 2017 Rio Tinto and The Perth Mint have showcased a A$1.8 million one-of-a-kind coin collection featuring three coloured diamonds from the Argyle Diamond Mine. Known as The Australian Trilogy, the beautiful collectable comprises three precious metal coins each hand crafted with a pink, purple pink and violet diamond unearthed from Rio Tinto’s Argyle …