Canadian miner Lucara Diamond has sold the massive 813-carat diamond it unearthed in Botswana last year for a record-setting price of $63,111,111 US.

The company announced the sale in a press release Monday. The name of the buyer was not divulged, but as part of the sale, Lucara is entitled to 10 per cent of the profits to be made from any polished diamonds that come out of the original down the line.

"We are very pleased with the result from the sale of this magnificent 813 carat diamond as well as the opportunity to further participate in profits earned when the polished product is sold," CEO William Lamb said.

At $77,649 US per carat, the gem is the most expensive rough diamond ever sold. But the Constellation, as Lucara is calling it, is unlikely to hold that record for very long.

Next month, Lucara will auction off another even larger diamond, this one clocking in at 1,109 carats.