CBC reported that the Lesdei la Rona diamond could sell for up to $90 million.
According to the article:

A three-billion-year-old diamond the size of a tennis ball — the largest discovered in over a century — could sell for close to $90 million Cdn, auctioneer Sotheby’s said Wednesday.
The diamond was unearthed in November in Botswana at a mine owned by Canada’s Lucara Diamond Corporation. It measured 1,109 carats, the second-largest gem-quality rough diamond ever discovered. Its name means “our light” in the Tswana language of southern Africa.

David Bennett, chairman of Sotheby’s jewelry division stated:

Not only is the rough superlative in size and quality, but no rough even remotely of this scale has ever been offered before at public auction.

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