3 supersized diamonds found at same Botswana mine

Three oversized diamonds, one the size of a tennis ball, were found in the same Botswana mine within 72 hours.

The most impressive gem, coming in at a sparkling 1,109 karats, is the second largest diamond ever discovered.

That’s the equivalent of almost 32 of Mariah Carey’s 35-karat engagement rings.

Worker Tiroyaone Mathaba, who found the record-setting diamond, told the BBC he recovered a 239 karat diamond two years earlier in the same spot -- the Karowe mine.

One of the other diamonds discovered recently at the mine came in at 812.77 karats. The diamond, dubbed The Constellation, was sold for $63.1 million. The other was 374 karats.

The tennis ball-sized diamond, Lesedi la Rona, was for sale at a London auction June 29, but failed to find a buyer, AP reported.

Bidding reached $61 million, which was below the minimum reserve price. So, there's still a chance to see it.

Lucara Diamond Corp, the company that found the diamond, said it might go on loan to museums, Reuters reports.

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