Biggest white diamond to be auctioned, egg-shaped 'The Rock', fetches over $21 million in auction
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Christie's says 'The Rock,' an egg-sized white diamond billed as the largest of its kind to go up for auction, sold on Wednesday for more than 21.6 million Swiss francs (USD21.75 million), including fees - though at the low end of the expected range. An unspecified private buyer acquired The Rock, for which the pre-auction estimate was between 19 million and 30 million francs.