'The Rock' white diamond could fetch $20-30 million -- or more - Copyright AFP/File Mohd RASFAN 'The Rock' white diamond could fetch $20-30 million -- or more ...
GENEVA, Switzerland — Christie's says “The Rock,” an egg-sized white diamond billed as the largest of its kind to go up for auction, sold Wednesday for more than 21.6 million Swiss francs ($21.75 ...
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