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    THE ROCK  (228.31 carats)  and THE RED CROSS DIAMOND (205.07 carats). UPDATE: THE ROCK MADE CHF21,681,000 / $21,894,082 / €20,722,133, THE RED CROSS DIAMOND MADE CHF14,181,250 / $14,320,624 / €13,554,068

    The Rock, the largest white diamond seen throughout auction market history and The Red Cross Diamond will lead Christie’s sale of Magnificent Jewels in Geneva on May 11.  The sale will offer a superb selection of historic and modern jewellery, alongside two diamonds that are each considered among the most exceptional gemstones to ever appear at auction. The Rock is estimated at CHF19 million -30 million (€18.58 million – €29.33 million) and The Red Cross Diamond is expected to fetch as much as €10.05 million. 

    The sale includes exceptional tiaras from the 19th and 20th centuries, among them the Fürstenberg Tiara, a pearl and diamond tiara bearing the mark of the famous Austrian jeweller Gustav Flach. It belonged to H.S.H. The Princess of Fürstenberg, née Countess Irma of Schönborn Buchheim (1867-1948), a member of one of the pre-eminent aristocratic families in the Habsburg Empire.  An important selection of Jewels by JAR showcase Mr. Rosenthal’s superior craftsmanship and passion for innovation and design including a sapphire bracelet of 27.37 carats and a pair of multi-gem ‘disc’ pendent earrings.

    (See posts on for April 12 and March 25, 2022)

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