Rare coloured diamonds to go under the hammer in Geneva

Two rare coloured diamonds are going under the auction hammer in Geneva, with one standout blue diamond discovered in a South African mine last year expected to fetch up to $55m (€51m), which would set a world record for any gemstone.

Today, Christie’s starts off the two-day blitz of jewellery sales with an auction headlined by ‘The Pink’, a 16.08-carat diamond billed as rare for pure colour. Its estimated pre-sale price is between €21m-€26m.

Sotheby’s expects to fetch up to €51m tomorrow with the sale of the 12.03-carat Blue Moon Diamond, said to be among the largest known fancy vivid blue diamonds.