Botswana diamond could be world's third largest

A diamond believed to be the third largest ever found has been put on display in Botswana.

The stone - weighing 1,098 carats - was shown to President Mokgweetsi Masisi, two weeks after the diamond firm, Debswana, unearthed it, BBC reports.

The huge gem is only slightly less heavy than the world's second-largest diamond which was also found in Botswana in 2015.

Botswana is Africa's largest producer of diamonds.

"This is the largest diamond to be recovered by Debswana in its history of over 50 years in operation," said Lynette Armstrong, Debswana Diamond Company's acting managing director.

"From our preliminary analysis it could be the world's third largest gem quality stone."

Debswana is a joint venture between the government and global diamond giant De Beers and up to 80% of the income from sales goes to state coffers through dividends, royalties and taxes.

An estimate of the stone's potential cost has not yet been released but in 2017, the second-largest diamond ever found, Lesedi La Rona, was sold for $53m (£39.5m).

The biggest diamond ever discovered was the 3,106 carat Cullinan diamond found in South Africa in 1905.