Rare ‘Mellon Blue’ diamond expected to fetch up to $30 million at auction
Geneva’s November auctions will showcase the 9.51-carat “Mellon Blue” diamond, a Fancy Vivid Blue gem valued at up to $30 million, alongside the Glowing Rose pink diamond and historic jewels once owned by Napoleon.
READ MORE : http://www.euronews.com/2025/11/09/rare-mellon-blue-diamond-expected-to-fetch-up-to-30-million-at-auction
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