Mining giant Rio Tinto said it has unearthed a "remarkable" 12.76 carat pink diamond in Australia, the largest of the rare and precious stones ever found in the resources-rich nation. Named the Argyle Pink Jubilee, the huge rough stone was found at Rio’s pink diamond operations in the Kimberley region of Western Australia and would take 10 days to cut and polish.
Though it would not speculate on how much the Jubilee was worth, Rio said extremely high quality pink diamonds could fetch in excess of US$1 million per carat, meaning it is likely to go for at least $10 million. The light pink Argyle Jubilee is a similar colour to the 24-carat Williamson Pink given to Britain’s Queen Elizabeth II as a wedding gift which was later set into a Cartier brooch for her coronation. The Williamson was discovered in Tanzania in 1947 and is ranked among the finest pink diamonds in existence. It is the ninth-largest in the world.