Ammon News - The world's second biggest diamond could soon find a new home in a museum of a sheikh's collection – but only once it has been properly evaluated.

Unearthed in Botswana last year, the 2,492–carat stone is known as Motswedi.

Before it finds its home, gem dealer HB Antwerp needs to price it – something that is proving tricky.

'At the moment it's very hard to put a price on it,' Margaux Donckier, HB Antwerp's public affairs director told AFP.

'We first have to inspect the stone and see what we can yield from it in polished form.'

The gem, uncovered by Canadian mining firm Lucara, is the largest diamond seen in the last 120 years since the discovery of the world–famous Cullinan Diamond.

The 3,106–carat stone was found in neighbouring South Africa in 1905 and was cut into nine separate stones, many of which now form part of the British crown jewels.

While the Motswedi hasn't got a proper price tag yet, it has already received 'plenty of interest from all over the world,' Ms Donckier said.

HB Antwerp is showcasing the Motswedi alongside three other gems – including the world's third largest diamond, which was recently found in the same mine.

While difficult to price individually at this stage, collectively the four should fetch at least $100 million, according to Ms Donckier.

Daily Mail