The Graff Pink diamond, which sold for £31.6 million at auction in Geneva in 2010. Photo: AFP

How Joseph Lau’s US$48m diamond rates against five other big rocks

When the fugitive Hong Kong billionaire slapped down what for most of us is a huge sum for the 12-carat 'Blue Moon' at an auction this week, it had us wondering who else has been splashing out on rare diamond jewellery

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The Graff Pink diamond, which sold for £31.6 million at auction in Geneva in 2010. Photo: AFP
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