GENEVA: A dazzling blue diamond once owned by mining magnate Philip Oppenheimer could fetch a record sale price Wednesday, with auction house Christie’s hoping it tops the staggering $48.4 million mark set last year.

The 14.62-carat “Oppenheimer Blue” is the largest stone in the exceptionally-rare Fancy Vivid Blue category ever to go under the hammer, according to Christie’s, which has valued the gem between $38 million (34 million euros) and $45 million.

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