10 down Impoverished country forming en enclave in South Africa where a diamond unearthed in 2006 turned out to be one of the biggest in history (7)
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LESOTHO
The Lesotho Promise, a 603 carat (121 g) diamond unearthed on 22 August 2006 at the Letseng diamond mine in Lesotho; it is the largest reported find this century and the 15th largest diamond ever found.