Rare blue diamond worth at least £10.3 million found

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A rare diamond has been unearthed from a diamond mine in South Africa. The stone is unusual partly because it's blue - which is one of the rarest diamond colours. It's also enormous - weighing in at 29.6 carats. And it is said to have outstanding tone, clarity and saturation.

The stone could fetch £10.3 million. But how does it compare to the most expensive diamonds ever sold?%VIRTUAL-SkimlinksPromo%