2. The Historic Pink—$15.90 Million
While the history of this pink stone is unclear, its rumored origin story is likely what lead to the piece’s lofty 14,810,000 CHF (approx. $15.90 million USD at the time of auction) price tag. The Historic Pink, sold by Sotheby’s, is believed to have belonged to French Princess Mathilde Bonaparte, niece of Napoleon I. A popular Parisian socialite, her collection of jewels and diamonds was believed to be second only to the Empress. The stone may have appeared in an auction of her jewels in 1904, the year of her death. The Historic Pink was believed to be called the Splendide Brilliant Rose then, and the centerpiece stone of a diamond necklace.