Valued at $1 million - group buy? 
http://blog.perthmint.com.au/2016/0...e-together-in-a-spectacular-coin-masterpiece/
Australian outback riches come together in a spectacular coin masterpiece
The world's first coin featuring a significant red diamond from Rio Tinto's iconic Argyle Pink Diamond Mine was unveiled at The Perth Mint today.
Crafted from 1 kilo of 99.99% pure gold, the one-of-a-kind Kimberley Treasure coin features a bounding 'red kangaroo' and a radiant 0.54 carat red diamond. Selected for the Argyle Pink Diamond Tender, the most exclusive diamond sale in the world, the specially cut gemstone is hand set between the animal's front paws.
http://blog.perthmint.com.au/2016/0...e-together-in-a-spectacular-coin-masterpiece/