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7. Emerald and Diamond Tiara: $12.7 Million
An exquisite antique piece of jewelry, this emerald and diamond tiara is even more valuable thanks to its past ownership. The tiara was initially commissioned by a German prince, Guido Henckel von Donnersmarck, for his wife Katharina. Later, it was worn by the wife of French Emperor Napoleon III. Manufactured around 1900, it is decorated with 11 rare Colombian pear-shaped emerald gems, all summing up over 500 karats. It is believed that the gems once embellished the neck of a Maharajah. This rare antique was sold to an anonymous buyer during a Sotheby’s auction in 2011 in Geneva.
