By Euronews
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The world’s most-expensive unpolished diamond at the time of sale has been unveiled in a Paris exhibition.
The world’s most-expensive unpolished diamond at the time of sale has been unveiled in a Paris exhibition.
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Swiss jewellery maker Grisogono displayed the 813-carat gem, which was bought for over 60 million US dollars – around 56 million euros.
Canadian miner Lucara Diamond sold the stone after unearthing it in Botswana last year.
It has been named ‘Constellation.’
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