Blue-green diamond sold for $8.5m in 2014 fetched $17.3m in 2026
Ocean Dream, a unique blue-green diamond weighing 5.50 carats, was auctioned at Christie's Geneva for $17.3 million. This diamond, initially sold in 2014 for approximately $8.5 million, experienced a significant increase in value. Its distinct colouring results from natural radiation exposure during its geological formation. Notably, the Ocean Dream was previously showcased at the Smithsonian…
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