Egg-sized diamond set to fetch $28m-plus

A New York auction house is showing off what it calls the world’s greatest white diamond on the block — a 118-carat stone from Africa the size of a small egg.

The oval diamond glistened in its glass case at Sotheby’s Manhattan headquarters, not yet mounted after it was mined and cut two years ago.

It will be auctioned in Hong Kong on Oct 7 and has a pre-sale estimate of $28m to $35m (€26.68m).